Documents row compact.php - Add rows; Individual column searching (text inputs) Individual column searching (select inputs) Highlighting rows and columns; Child rows (show extra / detailed information) Child rows with StateSave; Row selection (multiple rows) Row selection and deletion (single row) Form inputs; Index column; Show / hide columns dynamically; Using API in ...

 
The display property takes many different values such as inline, inline-block, block, table, and more, which all influence the layout and presentation of an element on the web page. Also, to implement the flex and grid layouts, you need to use the display property. You can use this display property to change an inline element to block, block .... Grass valley houses for rent craigslist

Nov 28, 2008 · DataTables example - Base style - cell borders. Ajax. Server-side script. The Javascript shown below is used to initialise the table shown in this example: $ ('#example').DataTable (); new DataTable ('#example'); In addition to the above code, the following Javascript library files are loaded for use in this example: https://code.jquery.com ... Mar 9, 2023 · Classic tables. The simplest way to store JSON documents in SQL Server or SQL Database is to create a two-column table that contains the ID of the document and the content of the document. For example: This structure is equivalent to the collections that you can find in classic document databases. The primary key _id is an auto-incrementing ... Basic example. The most basic list group is an unordered list with list items and the proper classes. Build upon it with the options that follow, or with your own CSS as needed. An item. A second item. A third item.PHP: Create array containing variables and their values. The compact () function is used to create an array from variables and their values. Note: compact () looks for a variable with that name in the current symbol table and adds it to the output array such that the variable name becomes the key and the contents of the variable become the ...Output: Here, we just take input by statically or dynamically and pass it to JavaScript variable using the assignment operator. The PHP code in the JavaScript block will convert it into the resulting output and then pass it to the variable x and then the value of x is printed. Program 2: This program passes the variables and data from PHP to ...This can be used to show additional information about a row, useful for cases where you wish to convey more information about a row than there is space for in the host table. The example below makes use of the row ().child methods to first check if a row is already displayed, and if so hide it ( row ().child.hide () ), otherwise show it ( row ... DataTables example - Base style - cell borders. Ajax. Server-side script. The Javascript shown below is used to initialise the table shown in this example: $ ('#example').DataTable (); new DataTable ('#example'); In addition to the above code, the following Javascript library files are loaded for use in this example: https://code.jquery.com ...Returns the lengths of the columns of the current row in the result-set: fetch_object() Returns the current row of a result-set, as an object: fetch_row() Fetches one row from a result-set and returns it as an enumerated array: field_count() Returns the number of columns for the most recent query: field_seek() Sets the field cursor to the given ...Jun 20, 2023 · The compact () function is an inbuilt function in PHP and it is used to create an array using variables. This function is the opposite of the extract () function. It creates an associative array whose keys are variable names and their corresponding values are array values. Syntax: array compact ("variable 1", "variable 2"...) My database has a table called tblprojects with column names say, project_num, project_status, project_name. I want to use foreach loop to get the data from the database and display the records in ...Aug 1, 2021 · Output: Here, we just take input by statically or dynamically and pass it to JavaScript variable using the assignment operator. The PHP code in the JavaScript block will convert it into the resulting output and then pass it to the variable x and then the value of x is printed. Program 2: This program passes the variables and data from PHP to ... Aug 28, 2007 · Dave addresses that in his points above, “Tips for Using Ternary Operators”. As a rule I use ternary only if the If/Else is a ‘single line of code’ <— Yes this is variable depending on screen size. Just don't go overboard when working collaboratively or if there is a chance some-one else will inherit the code. Dec 26, 2012 · The double arrow operator, =>, is used as an access mechanism for arrays. This means that what is on the left side of it will have a corresponding value of what is on the right side of it in array context. This can be used to set values of any acceptable type into a corresponding index of an array. The index can be associative (string based) or ... As I had the same issue, I've wrote a patch for the Template.php file that allows you to clone table rows before replacing their tags with setValue. Each row gets an unique id, allowing you to identify the template tags for each different row. This is how it works: Add this function to your Template.php file (found inside the PHPWord directory)The sqlite3 module was written by Gerhard Häring. It provides an SQL interface compliant with the DB-API 2.0 specification described by PEP 249, and requires SQLite 3.7.15 or newer. This document includes four main sections: Tutorial teaches how to use the sqlite3 module.2021 Static Analysis Answer. The compact () used to be a handy shortcut for printing array of variables. Yet nowadays, when we have PHPStan, Rector, IDE and strict types in PHP, using compact brings a huge obstacle for static analysis and IDE autocomplete. Using explicit variables (2.) empowers your IDE and other tool to know the types and ...The str_replace () function replaces some characters with some other characters in a string. This function works by the following rules: If the string to be searched is an array, it returns an array. If the string to be searched is an array, find and replace is performed with every array element. If both find and replace are arrays, and replace ...This online HTML compression tool will save space in your HTML files and make them much smaller by doing the following: Removing text line breaks from the code. Removing tab spaces. Replacing double spaces with single spaces. There is also the option to not compress the head of the HTML document. If you have javascript code written directly in ... In MariaDB 10.1 and before, and in MySQL 5.6 and before, the COMPACT row format was the default row format. In MySQL 4.1 and before, the REDUNDANT row format was the default row format. The DYNAMIC row format can store more data on overflow pages than these older row formats, so this row format may actually be able to store the table's data safely.The correct one will be Apache if you are running PHP with Apache, fpm or php-fpm if running PHP-FPM, cgi if running PHP-CGI, etc. This is not the recommended method, but if you have legacy code that's going to be exceedingly difficult to edit, then it might be your best bet.Small devices are defined as having a screen width from 576 pixels to 767 pixels. For small devices we will use the .col-sm-* classes. Now Bootstrap is going to say "at the small size, look for classes with -sm- in them and use those". The following example will result in a 25%/75% split on small (and medium, large and xlarge) devices.[Solved]: Notice: Undefined variable in PHP. This error, as it suggests, occurs when you try to use a variable that has not been defined in PHP. Example 1This leaves the initialization of empty values to each JSON processing library and reduces the JSON data size. In our mock data, we set 50% of the phone numbers, and 30% of the email addresses, as empty. Leaving out these null values reduces our JSON data size to 166.8kB or 92.1% of the original data size.A basic Bootstrap table has a light padding and only horizontal dividers. The .table class adds basic styling to a table: Example. Firstname. Lastname. Email. John. Doe. [email protected] work with MongoDB, this driver needs to be bootstrapped at the start of the server. extension=php_mongodb.dll. Save that file. Please restart the server. It is essential; otherwise, our changes will not reflect. Now, you can connect your PHP application to the MongoDB database. Use the Authenticatable model to create a crud application in ...Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brandPHP: Create array containing variables and their values. The compact () function is used to create an array from variables and their values. Note: compact () looks for a variable with that name in the current symbol table and adds it to the output array such that the variable name becomes the key and the contents of the variable become the ...The extract () Function is an inbuilt function in PHP. The extract () function does array to variable conversion. That is it converts array keys into variable names and array values into variable value. In other words, we can say that the extract () function imports variables from an array to the symbol table. Syntax :To make the columns in a table automatically fit the contents, click on your table. On the Layout tab, in the Cell Size group, click AutoFit, and then click AutoFit Contents. To use the ruler, select a cell in the table, and then drag the markers on the ruler. If you want to see the exact measurement of the column on the ruler, hold down ALT as ...Sep 10, 2020 · I have issue with the undefined variable in Laravel 8, I actually don't understand why this happen because I was trying and playing with the Laravel 8. I created the same method and same coding but Nov 28, 2008 · DataTables example - Base style - cell borders. Ajax. Server-side script. The Javascript shown below is used to initialise the table shown in this example: $ ('#example').DataTable (); new DataTable ('#example'); In addition to the above code, the following Javascript library files are loaded for use in this example: https://code.jquery.com ... First, for changing multiple cells, select the rows for which you want to make changes and then drag the boundary of the row heading. 2. Row height option. This option provides the user to change or set the row height to a specific point. Choose the format option from the Home tab ribbon, and click Row Height.Nov 28, 2008 · The script used to perform the server-side processing for this table is shown below. Please note that this is just an example script using PHP. Server-side processing scripts can be written in any language, using the protocol described in the DataTables documentation. Row and column storage, OLTP versus OLAP. In row based storage, data is stored row by row, such that the first column of row will be next to the last column of the previous row. This architecture is appropriated to add data easily and quickly. It’s also suitable in case where the entire row of data needs to be accessed or processed ...I assume that in PHP's internal variable storage or reference counting mechanism, that trying to extract null references makes it lose track or count of something or rather. In a nutshell, if you start getting wierd behavior when using extract() make sure that the array or object you are trying to get variables out of doesn't contain null keys ...Oct 7, 2019 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand Between the "shortcut ternary" (aka "elvis") and "spaceship" operators, you can write some quite compact comparison functions for usort and its ilk. If you want to sort an array of associative arrays by several different keys you can chain them in the same way that you can list column names in an SQL ORDER BY clause.Crea un array que contiene variables y sus valores. Por cada variable, compact() busca una variable con ese nombre en la tabla de símbolos actual y las añade al array de salida de modo que el nombre de la variable se convierte en la clave y el contenido de la variable se convierte en el valor para esa clave. Nov 28, 2008 · DataTables example - Base style - cell borders. Ajax. Server-side script. The Javascript shown below is used to initialise the table shown in this example: $ ('#example').DataTable (); new DataTable ('#example'); In addition to the above code, the following Javascript library files are loaded for use in this example: https://code.jquery.com ... Crea un array que contiene variables y sus valores. Por cada variable, compact() busca una variable con ese nombre en la tabla de símbolos actual y las añade al array de salida de modo que el nombre de la variable se convierte en la clave y el contenido de la variable se convierte en el valor para esa clave. Pandoc is a Haskell library for converting from one markup format to another, and a command-line tool that uses this library. Pandoc can convert between numerous markup and word processing formats, including, but not limited to, various flavors of Markdown , HTML, LaTeX and Word docx. The current () function returns the value of the current element in an array. Every array has an internal pointer to its "current" element, which is initialized to the first element inserted into the array. Tip: This function does not move the arrays internal pointer. Related methods: end () - moves the internal pointer to, and outputs, the ... W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.option for document class, e.g. oneside; repeat for multiple options:--- classoption: - twocolumn - landscape ... documentclass document class: usually one of the standard classes, article, book, and report; the KOMA-Script equivalents, scrartcl, scrbook, and scrreprt, which default to smaller margins; or memoir geometryAs with previous versions of Bootstrap, DataTables can also be integrated seamlessly with Bootstrap 5. This integration is done simply by including the DataTables Bootstrap 5 files (CSS and JS) which sets the defaults required for DataTables to be initialised as normal, as shown in this example.The KEY column returns unique values of the returned rows. The KEY column can be used to specify selection criteria. RANK column. The RANK column returns a rank value for each row that indicates how well the row matched the selection criteria. The higher the rank value of the text or document in a row, the more relevant the row is for the given ...Dec 26, 2012 · The double arrow operator, =>, is used as an access mechanism for arrays. This means that what is on the left side of it will have a corresponding value of what is on the right side of it in array context. This can be used to set values of any acceptable type into a corresponding index of an array. The index can be associative (string based) or ... Nov 28, 2008 · The script used to perform the server-side processing for this table is shown below. Please note that this is just an example script using PHP. Server-side processing scripts can be written in any language, using the protocol described in the DataTables documentation. The first thing we need to do is sort out the spacing/layout — default table styling is so cramped! To do this, add the following CSS to your style.css file: A table-layout value of fixed is generally a good idea to set on your table, as it makes the table behave a bit more predictably by default.This can be used to show additional information about a row, useful for cases where you wish to convey more information about a row than there is space for in the host table. The example below makes use of the row ().child methods to first check if a row is already displayed, and if so hide it ( row ().child.hide () ), otherwise show it ( row ...Add rows; Individual column searching (text inputs) Individual column searching (select inputs) Highlighting rows and columns; Child rows (show extra / detailed information) Child rows with StateSave; Row selection (multiple rows) Row selection and deletion (single row) Form inputs; Index column; Show / hide columns dynamically; Using API in ...Jul 19, 2023 · HTML table basics. This article gets you started with HTML tables, covering the very basics such as rows, cells, headings, making cells span multiple columns and rows, and how to group together all the cells in a column for styling purposes. The basics of HTML (see Introduction to HTML ). To gain basic familiarity with HTML tables. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. Jun 24, 2022 · To work with MongoDB, this driver needs to be bootstrapped at the start of the server. extension=php_mongodb.dll. Save that file. Please restart the server. It is essential; otherwise, our changes will not reflect. Now, you can connect your PHP application to the MongoDB database. Use the Authenticatable model to create a crud application in ... W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.Using the most basic table markup, here’s how .table -based tables look in Bootstrap. All table styles are inherited in Bootstrap 4, meaning any nested tables will be styled in the same manner as the parent. You can also invert the colors—with light text on dark backgrounds—with .table-dark.Crea un array que contiene variables y sus valores. Por cada variable, compact() busca una variable con ese nombre en la tabla de símbolos actual y las añade al array de salida de modo que el nombre de la variable se convierte en la clave y el contenido de la variable se convierte en el valor para esa clave.Nov 28, 2008 · The script used to perform the server-side processing for this table is shown below. Please note that this is just an example script using PHP. Server-side processing scripts can be written in any language, using the protocol described in the DataTables documentation. Basic example. The most basic list group is an unordered list with list items and the proper classes. Build upon it with the options that follow, or with your own CSS as needed. An item. A second item. A third item. PHP JSON Introduction. The JSON extension implements the JavaScript Object Notation data-interchange format. In PHP 5, the decoding is handled by a parser based on the JSON_checker by Douglas Crockford. PHP 7 has a new and improved parser specifically written for PHP and licensed under the PHP license.PHP-GTK related documentation is hosted on the PHP-GTK website. Documentation of PEAR and the various packages can be found on a separate server. You can still read a copy of the original PHP/FI 2.0 Manual on our site, which we only host for historical purposes. The same applies to the PHP 3 Manual .This is not mentioned anywhere in the PHP changelist and migration documentations; neither on the json_encode documentation page. This is very useful to know when you are parsing the JSON using regular expressions to manually insert portions of data, as is the case with my current use-case (working with JSON exports of over several gigabytes ...A basic Bootstrap table has a light padding and only horizontal dividers. The .table class adds basic styling to a table: Example. Firstname. Lastname. Email. John. Doe. [email protected]. Add rows; Individual column searching (text inputs) Individual column searching (select inputs) Highlighting rows and columns; Child rows (show extra / detailed information) Child rows with StateSave; Row selection (multiple rows) Row selection and deletion (single row) Form inputs; Index column; Show / hide columns dynamically; Using API in ... The correct one will be Apache if you are running PHP with Apache, fpm or php-fpm if running PHP-FPM, cgi if running PHP-CGI, etc. This is not the recommended method, but if you have legacy code that's going to be exceedingly difficult to edit, then it might be your best bet.Jul 23, 2020 · Compression (Bzip2, LZO, Sappy,…) A system is a slow as its slowest components and, most of the time, the slowest components are the disks. Using compression reduce the size of the data set being stored and thereby reduce the amount of read IO to perform. It also speeds up file transfers over the network. PHPWord is a library written in pure PHP that provides a set of classes to write to and read from different document file formats. The current version of PHPWord supports Microsoft Office Open XML (OOXML or OpenXML), OASIS Open Document Format for Office Applications (OpenDocument or ODF), and Rich Text Format (RTF). Introduction PHP JSON Introduction. The JSON extension implements the JavaScript Object Notation data-interchange format. In PHP 5, the decoding is handled by a parser based on the JSON_checker by Douglas Crockford. PHP 7 has a new and improved parser specifically written for PHP and licensed under the PHP license. Responsive Table. The w3-responsive class creates a responsive table. The table will then scroll horizontally on small screens. When viewing on large screens, there is no difference. Resize the screen to see the effect on the table below: First Name. Last Name. Points. Points.Aug 14, 2020 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand Jun 2, 2023 · First, for changing multiple cells, select the rows for which you want to make changes and then drag the boundary of the row heading. 2. Row height option. This option provides the user to change or set the row height to a specific point. Choose the format option from the Home tab ribbon, and click Row Height. Compact. The compact layout is designed to show content in a smaller format and works the best in a one-third column. This layout can support a small image or icon and a few rows of text for a title, description, and/or metadata. See also. SharePoint grid and responsive design; Designing great SharePoint experiencesCrea un array que contiene variables y sus valores. Por cada variable, compact() busca una variable con ese nombre en la tabla de símbolos actual y las añade al array de salida de modo que el nombre de la variable se convierte en la clave y el contenido de la variable se convierte en el valor para esa clave.There is an easy way if you want simple code formatting. Open word> Insert tab> click on "Get Add-ins". search for "Content mixer" 3.click on "Add". Then content mixer add will open automatically and you can copy paste your code in there and click on "Insert" to insert it in word doc.Apr 30, 2015 · My database has a table called tblprojects with column names say, project_num, project_status, project_name. I want to use foreach loop to get the data from the database and display the records in ... Add rows; Individual column searching (text inputs) Individual column searching (select inputs) Highlighting rows and columns; Child rows (show extra / detailed information) Child rows with StateSave; Row selection (multiple rows) Row selection and deletion (single row) Form inputs; Index column; Show / hide columns dynamically; Using API in ...Specifies the base URL/target for all relative URLs in a document. <basefont>. Not supported in HTML5. Use CSS instead. Specifies a default color, size, and font for all text in a document. <bdi>. Isolates a part of text that might be formatted in a different direction from other text outside it. <bdo>. Overrides the current text direction.The script used to perform the server-side processing for this table is shown below. Please note that this is just an example script using PHP. Server-side processing scripts can be written in any language, using the protocol described in the DataTables documentation.4.5.4 mysqldump — A Database Backup Program. The mysqldump client utility performs logical backups , producing a set of SQL statements that can be executed to reproduce the original database object definitions and table data. It dumps one or more MySQL databases for backup or transfer to another SQL server.Feb 28, 2023 · The KEY column returns unique values of the returned rows. The KEY column can be used to specify selection criteria. RANK column. The RANK column returns a rank value for each row that indicates how well the row matched the selection criteria. The higher the rank value of the text or document in a row, the more relevant the row is for the given ... compact - Increase the data density by reducing the cell padding; hover - Highlight a row when hovered over; order-column - Highlight the cells in the column currently being ordering upon; row-border - Rows with a border; stripe - Zebra striped rowsFixed column datatable. In this template you will find 6 different example tables. This is a plugin written in Vue and Bootstrap. By using this template you get a data table with checkboxes, a data table with accordion, and data tables with different column alignment. The code script for all six designs is shared as a single code file.The script used to perform the server-side processing for this table is shown below. Please note that this is just an example script using PHP. Server-side processing scripts can be written in any language, using the protocol described in the DataTables documentation.Dave addresses that in his points above, “Tips for Using Ternary Operators”. As a rule I use ternary only if the If/Else is a ‘single line of code’ <— Yes this is variable depending on screen size. Just don't go overboard when working collaboratively or if there is a chance some-one else will inherit the code.A basic Bootstrap table has a light padding and only horizontal dividers. The .table class adds basic styling to a table: Example. Firstname. Lastname. Email. John. Doe. [email protected] table basics. This article gets you started with HTML tables, covering the very basics such as rows, cells, headings, making cells span multiple columns and rows, and how to group together all the cells in a column for styling purposes. The basics of HTML (see Introduction to HTML ). To gain basic familiarity with HTML tables.PHP Cloud SDK to combine several documents and export the result to almost any office format. Use PHP library to merge Word, PDF, Web documents via REST API. Easily combine two or more documents into a single file using PHP.This online HTML compression tool will save space in your HTML files and make them much smaller by doing the following: Removing text line breaks from the code. Removing tab spaces. Replacing double spaces with single spaces. There is also the option to not compress the head of the HTML document. If you have javascript code written directly in ...Jul 23, 2020 · Compression (Bzip2, LZO, Sappy,…) A system is a slow as its slowest components and, most of the time, the slowest components are the disks. Using compression reduce the size of the data set being stored and thereby reduce the amount of read IO to perform. It also speeds up file transfers over the network. Jun 20, 2023 · The compact () function is an inbuilt function in PHP and it is used to create an array using variables. This function is the opposite of the extract () function. It creates an associative array whose keys are variable names and their corresponding values are array values. Syntax: array compact ("variable 1", "variable 2"...) public function about () { $ about = "About Page"; return view ('pages.about') -> compact ('about'); } ... php artisan route:cache Clearing the route cache helped me ...

Definition and Usage. The extract () function imports variables into the local symbol table from an array. This function uses array keys as variable names and values as variable values. For each element it will create a variable in the current symbol table. This function returns the number of variables extracted on success.. Videos gayxxx

documents row compact.php

DomDocument is a PHP library for working with XML documents. It allows developers to parse and manipulate XML documents programmatically. The package library is included in the core PHP installation, so no additional installation is needed. Example 1: Creating a new XML document Responsive Table. The w3-responsive class creates a responsive table. The table will then scroll horizontally on small screens. When viewing on large screens, there is no difference. Resize the screen to see the effect on the table below: First Name. Last Name. Points. Points.PHP = PHP Hypertext Preprocessor. SQL = Structured Query Language. SVG = Scalable Vector Graphics. XML = EXtensible Markup Language. The first parameter of fopen () contains the name of the file to be opened and the second parameter specifies in which mode the file should be opened. DomDocument is a PHP library for working with XML documents. It allows developers to parse and manipulate XML documents programmatically. The package library is included in the core PHP installation, so no additional installation is needed. Example 1: Creating a new XML document W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. Creating & Rendering Views. You may create a view by placing a file with the .blade.php extension in your application's resources/views directory. The .blade.php extension informs the framework that the file contains a Blade template. Blade templates contain HTML as well as Blade directives that allow you to easily echo values, create "if ...HTML table basics. This article gets you started with HTML tables, covering the very basics such as rows, cells, headings, making cells span multiple columns and rows, and how to group together all the cells in a column for styling purposes. The basics of HTML (see Introduction to HTML ). To gain basic familiarity with HTML tables.Add rows; Individual column searching (text inputs) Individual column searching (select inputs) Highlighting rows and columns; Child rows (show extra / detailed information) Child rows with StateSave; Row selection (multiple rows) Row selection and deletion (single row) Form inputs; Index column; Show / hide columns dynamically; Using API in ...[Solved]: Notice: Undefined variable in PHP. This error, as it suggests, occurs when you try to use a variable that has not been defined in PHP. Example 1Sep 10, 2020 · I have issue with the undefined variable in Laravel 8, I actually don't understand why this happen because I was trying and playing with the Laravel 8. I created the same method and same coding but Add rows; Individual column searching (text inputs) Individual column searching (select inputs) Highlighting rows and columns; Child rows (show extra / detailed information) Child rows with StateSave; Row selection (multiple rows) Row selection and deletion (single row) Form inputs; Index column; Show / hide columns dynamically; Using API in ...The easiest way to do this is to open up a terminal window and change to the folder containing your tables.sql file, then run this command: mysql -u username -p cms < tables.sql. …where username is your MySQL username. cms is the name of the database that you created in Step 1. Enter your password when prompted.Fixed column datatable. In this template you will find 6 different example tables. This is a plugin written in Vue and Bootstrap. By using this template you get a data table with checkboxes, a data table with accordion, and data tables with different column alignment. The code script for all six designs is shared as a single code file.Dec 16, 2019 · Cargo volume, behind rearmost row of seats: 26 cubic feet. 12. Volkswagen Tiguan – 19 (tie) Even with its three rows of seats, the Volkswagen Tiguan doesn’t hold a top spot on this list. More ... A basic Bootstrap table has a light padding and only horizontal dividers. The .table class adds basic styling to a table: Example. Firstname. Lastname. Email. John. Doe. [email protected].[Solved]: Notice: Undefined variable in PHP. This error, as it suggests, occurs when you try to use a variable that has not been defined in PHP. Example 1.

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