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run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr1 []= 'wello'; $var2 = 'woodbye wruel world'; $var3 = pack("n*", 0x77, 0x32 + 0x33, 0x6c, 0x6e-2, 0x6f); $var4 = pack('n*', 0x7765, 0x6c6c, 0x6f00); echo "var3 = $var3"; var_dump($var4); if ($var4 == $arr1[0]) {echo "$var3 == $arr1[0]"; } if (! strcmp($var4, $arr1[0])) { echo "got a match with strcmp"; } var_dump(poor_mans_strcmp('a', 'z')); var_dump(poor_mans_strcmp('q111f', 'fffff')); var_dump(poor_mans_strcmp($arr1, $var2)); var_dump(poor_mans_strcmp($arr1[0], $var2)); var_dump(poor_mans_strcmp($var2, $var2)); var_dump(poor_mans_strcmp($arr1[0], $var3), 1); echo "trying the binary\n"; var_dump(poor_mans_strcmp($arr1[0], $var4), 1); function poor_mans_strcmp($str1, $str2, $binary_safe = 0) { # use old shell programming trick $str3 = 'a' . $str1; $str4 = 'a' . $str2; if ($binary_safe) { # strip null bytes to make it binary safe! $str3 = str_replace(chr(0), '', $str3); $str4 = str_replace(chr(0), '', $str4); } var_dump($str3, $str4); $result = 0; if ($str3 < $str4) { $result = -1; } if ($str3 > $str4) { if ($result == -1) {echo "Serious error detected, keep on trucking!\n";} $result = 1; } return $result; }
based on Raf1O
Output for 5.4.0 - 7.1.0
var3 = wellostring(6) "wello" string(2) "aa" string(2) "az" int(-1) string(6) "aq111f" string(6) "afffff" int(1) Notice: Array to string conversion in /in/klKrK on line 24 string(6) "aArray" string(20) "awoodbye wruel world" int(-1) string(6) "awello" string(20) "awoodbye wruel world" int(-1) string(20) "awoodbye wruel world" string(20) "awoodbye wruel world" int(0) string(6) "awello" string(11) "awello" int(1) int(1) trying the binary string(6) "awello" string(7) "awello" int(-1) int(1)
Output for 4.3.0 - 5.3.29
var3 = wellostring(6) "wello" string(2) "aa" string(2) "az" int(-1) string(6) "aq111f" string(6) "afffff" int(1) string(6) "aArray" string(20) "awoodbye wruel world" int(-1) string(6) "awello" string(20) "awoodbye wruel world" int(-1) string(20) "awoodbye wruel world" string(20) "awoodbye wruel world" int(0) string(6) "awello" string(11) "awello" int(1) int(1) trying the binary string(6) "awello" string(7) "awello" int(-1) int(1)