How-to articles, tricks, and solutions about PHP

A "PHP Fatal Error: Failed opening required file" error usually occurs when a PHP script tries to include a file that does not exist or cannot be accessed.

A PHP Fatal error is a type of error that occurs when the PHP interpreter encounters a serious problem and is unable to continue executing the script.

This error message indicates that the PHP script is trying to use the cURL library, which is not installed or enabled on the server.

This error usually occurs when you are trying to use the json_decode() function, which is used to decode a JSON string into a PHP variable, but the function is not available.

This error message typically occurs in PHP when you are trying to access a property of an object or variable that has not been initialized or does not exist.

To format a float to have 2 decimal places in PHP, you can use the number_format() function.

This error message is indicating that the PHP script is trying to open a file using the fopen() function, but the script does not have the necessary permissions to access the file.

To loop through a nested array in PHP using a foreach loop, you can use nested foreach loops.

To stay on the same page after a form submission in PHP, you can use the following steps.

In PHP, you can use the http_build_query function to create a URL encoded query string from an array.

In PHP, you can use the header() function to send a "Content-Disposition" header to prompt the user to download a file.

There are several reasons why a PHP header location redirect may not work:

A 301 redirect in PHP using the "header" function tells the browser that the page has permanently moved to a new location.

In PHP, you can add an element to the end of an array using the array_push() function.

You can use the DateTime class in PHP to find the time elapsed since a specific date time.

You can use dirname(dirname(__FILE__)) to go one level up in the directory structure when using __FILE__ (which returns the current file's path).

In PHP, a variable can be evaluated as a Boolean value in an if statement without the need to explicitly compare it to true or false.

In PHP, you can use the include or require statement to include a file with a relative path.

To use the file_get_contents function to retrieve the contents of an external URL in PHP, you will first need to ensure that the allow_url_fopen directive is enabled in your php.ini file.

It sounds like you are trying to run the PHP command from the command prompt, but it is not recognized as a valid command.

The isset() function in PHP can take multiple parameters, and it will return TRUE if all of the variables passed to it have been set, and FALSE if any of them have not.

There are a few possible reasons that json_decode() might return NULL when given what appears to be valid JSON.

In PHP, the "CC" field can be included in an email using the "mail" function by adding a "CC" header to the additional headers parameter.

The "Permission denied" error message is usually caused by a lack of write permissions for the user that is running the PHP script.

To insert a new record into a MySQL table that has an auto-increment primary key, you can use the INSERT statement with a list of comma-separated values.