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Request #52631 substr() returns unexpectedly false
Submitted: 2010-08-17 22:45 UTC Modified: 2010-08-18 04:57 UTC
From: david at grudl dot com Assigned:
Status: Wont fix Package: Documentation problem
PHP Version: Irrelevant OS:
Private report: No CVE-ID: None
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From: david at grudl dot com
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 [2010-08-17 22:45 UTC] david at grudl dot com
substr($s, 0, ...) is the usual way programmers shorten strings. And substr sometimes returns string, sometimes boolean (see #52628). So developers are forced to use (string) substr($s, 0, ...) everywhere. It should be emphatically stated in the documentation.


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 [2010-08-18 04:57 UTC]
-Status: Open +Status: Wont fix
 [2010-08-18 04:57 UTC]
The substr() manual page already says in the return values section that FALSE is returned on failure. I'm not sure how much clearer that can be.
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