Comments on: PHP single quotes Vs double quotes http://www.lalitmehta.com/home/2008/05/27/php-single-quotes-vs-double-quotes/ Tue, 08 Sep 2009 14:38:29 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Luke http://www.lalitmehta.com/home/2008/05/27/php-single-quotes-vs-double-quotes/comment-page-1/#comment-6 Luke Fri, 30 May 2008 16:22:24 +0000 http://www.lalitmehta.com/home/2008/05/27/php-single-quotes-vs-double-quotes/#comment-6 While this might seem like a big deal, it actually falls under the realm of micro-optimization - and, in most cases, the performance you gain is trivial, and not going to be noticed by any human users. Perl happens to do this too, but it converts double-quoted strings without variables inside them into single-quoted at compile time - see this writeup(http://perlmonks.org/?node_id=577891) for more info - although I can't tell you for sure whether PHP does the same. While this might seem like a big deal, it actually falls under the realm of micro-optimization – and, in most cases, the performance you gain is trivial, and not going to be noticed by any human users.

Perl happens to do this too, but it converts double-quoted strings without variables inside them into single-quoted at compile time – see this writeup(http://perlmonks.org/?node_id=577891) for more info – although I can’t tell you for sure whether PHP does the same.

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