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call-time-pass-by-reference error after updating the php to php 5.4
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call-time-pass-by-reference error after updating the php to php 5.4

Exisitng websites are not working after the upgradation of php to php5.4. Around 50 to 100 websites are there in one server. So not possible to change it in code wise. Finally upgraded to previous version php 5.2

Following functions are disabled in in php5.4


Backward Incompatible Changes

Although most existing PHP 5 code should work without changes, please take note of some backward incompatible changes:

Safe mode is no longer supported. Any applications that rely on safe mode may need adjustment, in terms of security.
Magic quotes has been removed. Applications relying on this feature may need to be updated, to avoid security issues. get_magic_quotes_gpc() and get_magic_quotes_runtime() now always return FALSE. set_magic_quotes_runtime() raises an E_CORE_ERROR level error on trying to enable Magic quotes.
The register_globals and register_long_arrays php.ini directives have been removed.
Call-time pass by reference has been removed.
The break and continue statements no longer accept variable arguments (e.g., break 1 + foo() * $bar;). Static arguments still work, such as break 2;. As a side effect of this change break 0; and continue 0; are no longer allowed.
In the date and time extension, the timezone can no longer be set using the TZ environment variable. Instead you have to specify a timezone using the date.timezone php.ini option or date_default_timezone_set() function. PHP will no longer attempt to guess the timezone, and will instead fall back to "UTC" and issue a E_WARNING.
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
Converting an array to a string will now generate an E_NOTICE level error, but the result of the cast will still be the string "Array".
Turning NULL, FALSE, or an empty string into an object by adding a property will now emit an E_WARNING level error, instead of E_STRICT.
Parameter names that shadow super globals now cause a fatal error. This prohibits code like function foo($_GET, $_POST) {}.
The Salsa10 and Salsa20 hash algorithms have been removed.
array_combine() now returns array() instead of FALSE when two empty arrays are provided as parameters.
If you use htmlentities() with asian character sets, it works like htmlspecialchars() - this has always been the case in previous versions of PHP, but now an E_STRICT level error is emitted.
The third parameter of ob_start() has changed from boolean erase to integer flags. Note that code that explicitly set erase to FALSE will no longer behave as expected in PHP 5.4: please follow this example to write code that is compatible with PHP 5.3 and 5.4.
The following keywords are now reserved, and may not be used as names by functions, classes, etc.

trait
callable
insteadof
The following functions have been removed from PHP:

define_syslog_variables()
import_request_variables()
session_is_registered(), session_register() and session_unregister().
The aliases mysqli_bind_param(), mysqli_bind_result(), mysqli_client_encoding(), mysqli_fetch(), mysqli_param_count(), mysqli_get_metadata(), mysqli_send_long_data(), mysqli::client_encoding() and mysqli_stmt::stmt().


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