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run code in 150+ php & hhvm versions
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<?php $array=array("a"=>"111","b"=>"2232332"); $array = array_combine(array_map(function($k){ return 'prefix'.$k; }, array_keys($array)) , $array ); echo "<pre>";print_r($array);
Output for 5.3.0 - 7.1.0
<pre>Array ( [prefixa] => 111 [prefixb] => 2232332 )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/ETFZp on line 3
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, expecting ')' in /in/ETFZp on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/ETFZp on line 3
Process exited with code 255.