PHP &$string - What does this mean?

php operands
Mickey picture Mickey · Dec 6, 2013 · Viewed 44.8k times · Source

I've been googling but I can't find anything. 

$x->func(&$string, $str1=false, $str2=false);

what does that & before $string &$string do?

Answer

Krish R picture Krish R · Dec 6, 2013

You are assigning that array value by reference.

passing argument through reference (&$) and by $ is that when you pass argument through reference you work on original variable, means if you change it inside your function it's going to be changed outside of it as well, if you pass argument as a copy, function creates copy instance of this variable, and work on this copy, so if you change it in the function it won't be changed outside of it

Ref: http://www.php.net/manual/en/language.references.pass.php

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