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How-to articles, tricks, and solutions about PHP

?: operator (the 'Elvis operator') in 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.

php conditional-operator language-construct

.rar, .zip files MIME Type

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

php zip mime-types rar

'AND' vs '&&' as operator

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

php operators operator-precedence

"call to undefined function imagecreatetruecolor" error in PHP & pChart

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.

php

"Database query failed: Data truncated for column 'column_name' at row 1

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.

php MySQL

"Typed property must not be accessed before initialization" error when introducing properties type hints?

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.

php php-7 php-7.4 type-hinting doctrine-orm

$_SERVER['HTTP_REFERER'] missing

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

php

413 Request Entity Too Large - File Upload Issue

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.

php nginx apache2

Access a global variable in a PHP function

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

php scope

Access denied for user 'homestead'@'localhost' (using password: YES)

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

php laravel laravel-5 database-migration homestead