How-to articles, tricks, and solutions about PHP

In PHP, global variables can be accessed and modified from within functions using the global keyword.

It sounds like you are trying to use the chmod command to change the permissions on a file, but you are encountering an error that says "Operation not permitted".

To check if the $_POST superglobal variable exists in PHP, you can use the isset() function.

In PHP, you can use the array_unique function to check if all values in an array are the same.

In PHP, you can use the is_float() function to check if a variable is a decimal number.

To check if Xdebug is working, you can try the following steps:

It sounds like you are having an issue with the isset() function in PHP not working properly when checking for a session variable.

In PHP, you can use the PDO (PHP Data Objects) extension to interact with a MySQL database.

In PHP, you can use the is_int() function to check if a variable is an integer.

To check if a date is a weekend in PHP, you can use the date function to get the day of the week for a given date and then check if it is either 0 (Sunday) or 6 (Saturday).

The "net::ERR_INCOMPLETE_CHUNKED_ENCODING" error in Chrome is usually caused by a problem with the website you are trying to load.

PSR-4 is a standard for autoloading classes in PHP.

To clear the contents of a text file using PHP, you can use the file_put_contents() function.

The $this->db->get() function in CodeIgniter is used to retrieve data from a database table.

To retrieve the last insert id in CodeIgniter using the Active Record class, you can use the $this->db->insert_id() method.

In CodeIgniter, you can rename a file on upload by using the do_upload() method of the Upload class.

Here's an example of how the error might appear in a Codeigniter application:

In CodeIgniter, the where method on the database class is used to add a WHERE clause to your query.

The "Commands out of sync; you can't run this command now" error in PHP usually occurs when you have called a MySQL function in an incorrect order.

The location of the curl installation depends on the operating system and the method used to install it.

When you use the Composer package manager to install PHP packages, it stores a local cache of the packages that you have installed.

To require a local package in Composer, you can use the "path" option in the "require" section of your project's composer.json file.

It looks like you are trying to use the composer command, but it is not recognized by your terminal.

This error message is indicating that the script is trying to write to the file "composer.json" in the current directory (indicated by "./"), but it doesn't have the necessary permissions to do so.

To remove a package with Composer, you can use the command composer remove [package-name].