3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php const INT_SIGNED = 1; const INT_LE = 2; function isLittleEndian() { return pack('S', 0x00FF) === "\xFF\x00"; } function is32Bit() { return PHP_INT_MAX < 0x80000000; } function unpack_int32($str, $flags = 0) { $length = strlen($str); if ($length < 4) { return false; } else if ($length > 4) { $str = substr($str, 0, 4); } $format = ($flags & INT_LE) ? 'V' : 'N'; $result = current(unpack($format, $str)); if (($result & 0x80000000) && ($flags & INT_SIGNED) && !is32Bit()) { $result = 0xFFFFFFFF00000000 | $result; } return $result; } var_dump(isLittleEndian(), is32Bit(), unpack_int32("\xFF\xFF\xFE\xFF", INT_SIGNED));
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true) bool(false) int(-257)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_CONST in /in/KNN9s on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_CONST in /in/KNN9s on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/KNN9s on line 3
Process exited with code 255.