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run code in 150+ php & hhvm versions
Bugs & Features
<?php function concat_path_components($path_components) { $first_component = array_shift($path_components); if ($first_component == NULL) return ""; return array_reduce( $path_components, function ($path, $path_component) { return $path . DIRECTORY_SEPARATOR . $path_component; }, $first_component); } function path_components($path) { $components = array(); while ($path != "." && $path != "/") { array_unshift($components, basename($path)); $path = dirname($path); } if ($path == "/") array_unshift($components, "/"); return $components; } function path_relative_to($path, $rel) { $path_components = path_components($path); $copy = $path_components; $rel_components = path_components($rel); var_dump($path_components); var_dump($rel_components); for($i = 0 ; $i < count($rel_components) ; ++$i) { echo $path_components[$i] . " == " . $rel[$i] . " ?\n"; if ($path_components[$i] == $rel[$i]) array_shift($copy); else break; } var_dump($copy); echo $i . " " . count($rel_components) . PHP_EOL; if ($i == count($rel_components)) return concat_path_components($copy); else return NULL; } var_dump(path_relative_to("/a/b/c", "/a/b"));
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(4) { [0]=> string(1) "/" [1]=> string(1) "a" [2]=> string(1) "b" [3]=> string(1) "c" } array(3) { [0]=> string(1) "/" [1]=> string(1) "a" [2]=> string(1) "b" } / == / ? a == a ? b == / ? array(2) { [0]=> string(1) "b" [1]=> string(1) "c" } 2 3 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/MW2JT on line 12
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_FUNCTION in /in/MW2JT on line 12
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/MW2JT on line 12
Process exited with code 255.