Are php strings immutable?

Question

Or: Should I optimize my string-operations in PHP? I tried to ask PHP’s manual about it, but I didn’t get any hints to anything.

Answer

PHP already optimises it – variables are assigned using copy-on-write, and objects are passed by reference. In PHP 4 it doesn’t, but nobody should be using PHP 4 for new code anyway.

Accepted Answer

PHP already optimises it &#8211; variables are assigned using copy-on-write, and objects are passed by reference. In PHP 4 it doesn&#8217;t, but nobody should be using PHP 4 for new code anyway.

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Answer