3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $big = PHP_INT_MAX - 128; echo bin2hex(pack('P', $big)); echo "\n"; echo bin2hex(pack('V', ($big & 0x00000000ffffffff) << 32, $big & 0xffffffff00000000));
based on fVSFF
Output for 5.6.7 - 7.2.0
7fffffffffffff7f Warning: pack(): 1 arguments unused in /in/F3ipJ on line 5 00000000
Output for 5.3.18 - 5.5.35
Warning: pack(): Type P: unknown format code in /in/F3ipJ on line 3 Warning: pack(): 1 arguments unused in /in/F3ipJ on line 5 00000000