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As a side effect of this change break 0 and continue 0 are no longer allowed. Static arguments still work, such as break 2. The break and continue statements no longer accept variable arguments (e.g., break 1 + foo() * $bar ).Call-time pass by reference has been removed.The mbstring.script_encoding directive has been removed.The register_globals and register_long_arrays php.ini directives have been removed.set_magic_quotes_runtime() raises an E_CORE_ERROR level error on trying to enable Magic quotes.get_magic_quotes_gpc() and get_ magic_quotes_runtime() now always return FALSE.
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Applications relying on this feature may need to be updated, to avoid security issues. Any applications that rely on safe mode may need adjustment, in terms of security. This means that s2k hashing is no longer available as of PHP 5.3.0. However not all the algorithms are covered, notable the s2k hashing algorithm. An emulation layer for the MHASH extension to wrap around the Hash extension have been added.func_get_arg(), func_get_args() and func_num_args() can no longer be called from the outermost scope of a file that has been included by calling include or require from within a function in the calling file.The _call() magic method is now invoked on access to private and protected methods.The magic methods _get(), _set(), _isset(), _unset() and _call() must always be public and can no longer be static.The _toString() magic method can no longer accept arguments.The trailing / has been removed from the SplFileInfo class and other related directory classes.Note that this means the PDO specific constants PDO::MYSQL_ATTR_READ_DEFAULT_FILE and PDO::MYSQL_ATTR_READ_DEFAULT_GROUP are not defined if MySQL support in PDO is compiled with mysqlnd.
Upgrading from php 5.2 to 5.6 code#
If your code relies on settings in the configuration file, you can load it explicitly with the mysqli_options() function.
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Upgrading from php 5.2 to 5.6 password#
The new mysqlnd library requires the use of MySQL 4.1's newer 41-byte password format.Any previous code passing constants or literals to functions expecting references, will need altering to assign the value to a variable before calling the function.
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Where previously the function would accept the by-value argument, a fatal error is now emitted. The behaviour of functions with by-reference parameters called by value has changed.To apply these functions to an object you can cast the object to an array first. The array functions natsort(), natcasesort(), usort(), uasort(), uksort(), array_flip() and array_unique() no longer accept objects passed as arguments.The call_user_func() family of functions now propagate $this even if the callee is a parent class.Consequence of this is that invalid relative paths such as _FILE_. realpath() is now fully platform-independent.clearstatcache() no longer clears the realpath cache by default.Functions now return NULL when they are passed incomputable parameters, however there are some exceptions to this such as the get_class() function, which continues to return FALSE on error.These are the features that have changed and will not function in the same way as earlier versions of PHP. substr() now returns an empty string, if string is equal to start characters long.exec(), system() and passthru() functions have NULL byte protection now.setlocale() function no longer accepts category passed as string.preg_replace_callback() should be used instead. preg_replace() function no longer supports "\e" (PREG_REPLACE_EVAL).mktime() and gmmktime() functions no longer accept is_dst parameter.getrusage() is now supported on Windows.dirname() now optionally takes a second parameter, depth, to get the name of the directory depth levels up from the current directory.debug_zval_dump() now prints "int" instead of "long", and "float" instead of "double".Please check if you are using any of these functions and change your code appropriately. The official PHP migration guides can be found here:Ĭhanges to core PHP functions are very likely to impact you.