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@ 2014-10-03T14:19:12Z

<?php
class foo
{
	public $field1;
	public $field2;
	public $field3;
}

$foo = new foo();
$foo->field1 = 2;
var_dump($foo);
$field1 = 'field1';
var_dump(isset($foo->$field1));

Output
Performance
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References
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var_dump: documentation ( source)

preferences:dark modelive preview

50.77 ms | 402 KiB | 5 Q