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<?php $str = '/product/random?category_id=1'; $pattern = '/regex/'; var_dump(preg_match($str, $pattern, $matches = []));
Output for 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught Error: preg_match(): Argument #3 ($matches) could not be passed by reference in /in/q7G3M:4 Stack trace: #0 {main} thrown in /in/q7G3M on line 4
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught Error: preg_match(): Argument #3 ($matches) could not be passed by reference in /in/q7G3M:4 Stack trace: #0 {main} thrown in /in/q7G3M on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Fatal error: Uncaught Error: preg_match(): Argument #3 ($matches) cannot be passed by reference in /in/q7G3M:4 Stack trace: #0 {main} thrown in /in/q7G3M on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Only variables should be passed by reference in /in/q7G3M on line 4 Warning: preg_match(): Unknown modifier 'r' in /in/q7G3M on line 4 bool(false)
Output for 7.3.32 - 7.3.33
Warning: preg_match(): Unknown modifier 'r' in /in/q7G3M on line 4 bool(false)
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Strict Standards: Only variables should be passed by reference in /in/q7G3M on line 4 Warning: preg_match(): Unknown modifier 'r' in /in/q7G3M on line 4 bool(false)

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