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run code in 300+ PHP versions simultaneously
<?php function isAssoc($array) { return !(bool)count(array_filter(array_keys($array), 'is_string')); } // everything is associative array in PHP. Ideal question to ask is if it sequential var_dump(isAssoc(array())); // true/undefined var_dump(isAssoc(['a'])); // false var_dump(isAssoc([])); // undefined var_dump(isAssoc(array(0 => 'a', 1 => 'b'))); // true var_dump(isAssoc(array(0 => 'a', 5 => 'b'))); // true var_dump(isAssoc(array('a', 'b', 'c'))); // false var_dump(isAssoc(array("0" => 'a', "1" => 'b', "2" => 'c'))); // false var_dump(isAssoc(array("1" => 'a', "0" => 'b', "2" => 'c'))); // true var_dump(isAssoc(array("a" => 'a', "b" => 'b', "c" => 'c'))); // true
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
bool(true) bool(true) bool(true) bool(true) bool(true) bool(true) bool(true) bool(true) bool(false)
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 bool(true) bool(true) bool(true) bool(true) bool(true) bool(true) bool(true) bool(true) bool(false)
preferences:
175.24 ms | 402 KiB | 182 Q