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run code in 150+ php & hhvm versions
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<?php $key = '价格'; $doc = []; $value=$doc[$key] = null; var_dump($doc); if($value == '0' || is_numeric($value)) $doc[$key] = floatval($value); else unset($doc[$key]); var_dump($doc);
Output for 5.4.0 - 7.1.0
array(1) { ["价格"]=> NULL } array(0) { }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/EVQfs on line 4
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 '[' in /in/EVQfs on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/EVQfs on line 4
Process exited with code 255.