How-to articles, tricks, and solutions about PHP

The Elvis operator, represented by a question mark followed by a colon (?:), is a ternary operator in PHP that is used to simplify expressions that return a value based on a condition.

In PHP, you can use the finfo_file function to determine the MIME type of a file.

In PHP, both 'AND' and '&&' are logical operators that are used to test if two statements are true.

The "call to undefined function imagecreatetruecolor" error in PHP typically occurs when the GD library, which is required to create image resources, is not installed or enabled on the server.

This error message is indicating that a database query has failed due to data being too large to fit into a specific column in the database table.

In PHP, the "Typed property must not be accessed before initialization" error is encountered when a property is defined with a type hint, but it is accessed before it has been explicitly assigned a value.

The $_SERVER['HTTP_REFERER'] variable is a server-side variable that contains the URL of the page that linked to the current page.

The HTTP error 413 Request Entity Too Large indicates that the server is unable to process the request because the request payload (the body of the request) is larger than the server is able to handle.

In PHP, you can access a global variable within a function by using the global keyword.

This error message indicates that there was a problem connecting to the MySQL database with the provided credentials.

In a TWIG template, you can access the session data by using the app.session variable.

In PHP, you can add 30 days to a date by using the DateTime class and the modify() method.

You can use the strtotime function in PHP to add a specified number of seconds to a given time.

You can add the "active" class to the active page using PHP by comparing the current URL to the URL of the page you want to mark as active.

To add data dynamically to an array in PHP, you can use the $array[] = $value syntax.

To add query string parameters to a GET request using Guzzle, you can use the query option when creating the request.

To upload an image using Ajax, you can use the following steps:

You can use the preg_replace function in PHP to remove any characters that do not match the specified pattern.

file_get_contents() is a built-in PHP function that is commonly used to read the contents of a file into a string.

In PHP, using array and string offset access syntax with curly braces has been deprecated as of PHP 7.4.

To add an element to the end of an array with a key-value pair in PHP, you can use the array_push() function.

This error message is indicating that the PHP extension for PDO MySQL is not installed or not enabled on your system.

In the Laravel framework, the "public" folder is the web server's document root and it's where assets such as CSS, JavaScript, and images should be stored.

To automatically log out a user after 15 minutes of inactivity in PHP, you can use the session mechanism provided by PHP.

Error 1146: Table 'table_name' doesn't exist