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<?php var_dump(preg_match('/.*/', hex2bin('ff'))); var_dump(preg_match('/^$/', hex2bin('ff'))); var_dump(preg_match('/.*/u', hex2bin('ff'))); var_dump(preg_grep('/.*/u', [hex2bin('ff')]));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
int(1) int(0) bool(false) array(0) { }
preferences:
81.52 ms | 1146 KiB | 4 Q