3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function isJson2($string) { try { json_decode($string); } catch (ErrorException $e) { return FALSE; } return (json_last_error() == JSON_ERROR_NONE); } /** * Checks whether a string is valid JSON. * * @param string $string * @return boolean */ function isJson($string) { // Make sure the string is not empty and whether it is a string. if(!empty($string) && is_string($string)) { json_decode($string); return (json_last_error() == JSON_ERROR_NONE); } return false; } $a=['arraiii'=>['dentro'=>234]]; $b=json_encode($a); $c=''; var_dump(isJson($c));
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false)
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/F4icH on line 35
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/F4icH on line 35
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '{' in /in/F4icH on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '{' in /in/F4icH on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/F4icH on line 5
Process exited with code 255.