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(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL phar >= 1.0.0)
Phar::canWrite — Returns whether phar extension supports writing and creating phars
This static method determines whether write access has been disabled in the system php.ini via the phar.readonly ini variable.
Example #1 A Phar::canWrite() example
<?php
if (Phar::canWrite()) {
file_put_contents('phar://myphar.phar/file.txt', 'hi there');
}
?>