function.deprecated

This error is reported by phpstan/phpstan-deprecation-rules.

Code example

<?php declare(strict_types = 1);

/**
 * @deprecated Use newHelper() instead.
 */
function oldHelper(): void
{
}

oldHelper();

Why is it reported?

The code calls a function that has been marked as deprecated via a @deprecated PHPDoc tag, or it calls a function like ini_get() or ini_set() with a deprecated INI option. Deprecated functions and options are planned for removal in a future PHP version and should no longer be used.

How to fix it

Replace the call with the recommended alternative:

 <?php declare(strict_types = 1);

-oldHelper();
+newHelper();

For deprecated INI options, use the replacement option or remove the call:

 <?php declare(strict_types = 1);

-ini_set('assert.quiet_eval', '0');
+// assert.quiet_eval was removed in PHP 8.0