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    Whatever you intended $l + ++$l to mean, I guarantee that there's a more straightforward way to express that intent. Commented Mar 15, 2012 at 7:10
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    as a side note: this is an example of question that Andi Gutmans sometimes use in conference. This is the expected behaviour in php as stated before by other users as ++$l is evaluated before the rest of the expression. Commented Mar 21, 2012 at 9:42