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@ 2014-10-25T22:57:33Z

<?php

${" "} = "blank space";
${"123"} = 456;
var_dump(${" "},${"123"});
$a = get_defined_vars();
echo array_key_exists(" ",$a)? "Yes" : "No","\n";
echo array_key_exists("123",$a)? "Yes" : "No";

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
get_defined_vars: documentation ( source)

preferences:dark modelive preview

51.15 ms | 405 KiB | 6 Q