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1. strrpos() and strripos() now use the entire string as a needle.
Be aware that the existing scripts may no longer work as you expect.
EX :
<?php
var_dump(strrpos("ABCDEF","DEF"));
var_dump(strrpos("ABCDEF","DAF"));
?>
Will give you different results. The former returns 3 while the latter
returns false rather than the position of the last occurrence of 'D'.
The same applies to strripos().
2. Illegal use of string offsets causes E_ERROR instead of E_WARNING.
EX :
<?php
$a = "foo";
unset($a[0][1][2]);
?>
Fatal error: Cannot use string offset as an array in ... on line 1
3. array_merge() was changed to accept only arrays. If a non-array variable is
passed, a E_WARNING will be thrown for every such parameter. Be careful
because your code may start emitting E_WARNING out of the blue.
4. Be careful when porting from ext/mysql to ext/mysqli. The following
functions return NULL when no more data is available in the result set
(ext/mysql's functions return FALSE).
- mysqli_fetch_row()
- mysqli_fetch_array()
- mysqli_fetch_assoc()
5. PATH_TRANSLATED server variable is no longer set implicitly under
Apache2 SAPI in contrast to the situation in PHP4, where it is set to the
same value as the SCRIPT_FILENAME server variable when it is not populated
by Apache. This change was made to comply with the CGI specification.
Please refer to bug #23610 for further information.
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