How-to articles, tricks, and solutions about PHP

In Twig, you can use the exists function to check if a specific key of an array exists.

In PHP, you can include a constant in a string without concatenating it by using double quotes (") instead of single quotes (') to define the string.

To increment a value in a MySQL update query using PHP, you can use the += operator.

To insert data into multiple tables using one form in PHP, you can use a single SQL statement with multiple INSERT INTO clauses, or you can use multiple individual SQL statements, one for each table.

To install the php70-gd package on Ubuntu, you will need to have the package manager apt-get installed.

To install a specific version of Laravel using the Composer create-project command, you can specify the version number after the package name.

To install the PHP 7 MongoDB driver, you can use the PECL (PHP Extension Community Library) command-line tool.

An interface defines a set of methods that a class must implement, but does not provide any implementation for those methods.

It is possible to invoke a PHP script from a MySQL trigger by using the system() function in the trigger's body.

Yes, Doctrine 2 provides a built-in way to get the changed fields in an entity.

Yes, there are several PHP sandbox options available online.

In PHP, the equivalent to a Java HashMap would be an associative array.

In PHP, isset() is a function that determines whether a variable is set and is not NULL.

In PHP, you can read the body of an HTTP request using the file_get_contents('php://input') function.

In PHP, you can use the json_decode() function to convert a JSON string into a PHP object or array.

JSON_ENCODE is a function that converts a PHP data structure, such as an array, into a JSON (JavaScript Object Notation) string.

In Laravel's Eloquent ORM, you can use the inRandomOrder method to retrieve a random row from the database.

In Laravel, you can use the $request object to access parameters from an HTTP request.

It looks like you are trying to use the htmlspecialchars() function in Laravel and are encountering an error that says "htmlspecialchars() expects parameter 1 to be string, object given".

If you are receiving an error stating that a specific Model class cannot be found in Laravel, there are a few possible causes:

It sounds like you are trying to use the Laravel session, but it is not available in the current request.

In Laravel, you can use the (:any?) wildcard to match any URI for a specific route.

In Laravel, you can use the where method on a query builder or an Eloquent model to filter records based on a date column using less than or greater than operators.

This error message in Laravel 5 typically means that you are trying to instantiate an interface, but interfaces cannot be instantiated because they are only a contract for the methods that a class should implement.

To clear the cache in Laravel 5, you can use the php artisan cache:clear command.