Aziz Saleh wrote: > Trying different versions of php give different results: > > http://sandbox.onlinephpfunctions.com/ > > $string = 'this is a string'; > var_dump($string['check']); > > var_dump(isset($string['check'])); > var_dump(isset($string['check'][0])); > > Biggest change from 5.3 -> 5.5 Good catch! I was not aware of this change. I have double-checked that on <http://3v4l.org/5GGYm>, and apparently, the behavior has completely turned around since PHP 5.4. The manual[1] notes: | Non-numeric string offsets - e.g. $a['foo'] where $a is a string - | now return false on isset() and true on empty(), and produce a | E_WARNING if you try to use them. Offsets of types double, bool and | null produce a E_NOTICE. Numeric strings (e.g. $a['2']) still work as | before. Note that offsets like '12.3' and '5 foobar' are considered | non-numeric and produce a E_WARNING, but are converted to 12 and 5 | respectively, for backward compatibility reasons. Note: Following | code returns different result. $str='abc';var_dump(isset($str['x'])); | // false for PHP 5.4 or later, but true for 5.3 or less I've also found a related (documentation) bug report: <https://bugs.php.net/bug.php?id=61507>. [1] <http://www.php.net/manual/en/migration54.incompatible.php> -- Christoph M. Becker -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
