runkit_function_redefine
(PECL runkit >= 0.7.0)
runkit_function_redefine — Replace a function definition with a new implementation
说明
$funcname
, string $arglist
, string $code
)Note: 默认情况下，仅在用户空间可删除，重命名，或者修改函数。为了覆盖内部函数，必须启用 php.ini 中的 runkit.internal_override 设置。
参数
-
funcname -
Name of function to redefine
-
arglist -
New list of arguments to be accepted by function
-
code -
New code implementation
返回值
成功时返回 TRUE ， 或者在失败时返回 FALSE 。
范例
Example #1 A runkit_function_redefine() example
<?php
function testme () {
echo "Original Testme Implementation\n" ;
}
testme ();
runkit_function_redefine ( 'testme' , '' , 'echo "New Testme Implementation\n";' );
testme ();
?> 以上例程会输出：
Original Testme Implementation New Testme Implementation
参见
- runkit_function_add() - Add a new function, similar to create_function
- runkit_function_copy() - Copy a function to a new function name
- runkit_function_rename() - Change a function's name
- runkit_function_remove() - Remove a function definition
用户评论:
[#1] lucato at gmail dot com [2011-12-25 16:10:43]
Note to users: language constructs (eval, die, exit, isset, unset, echo etc.) which might be confused with functions, cannot be renamed or redefined even with runkit.internal_override.
[#2] corentin dot delorme at linagora dot com [2007-09-05 06:04:08]
Here is another example with a parameter:
<?php
function hello_world($word) {
echo "Original Hello World: $word\n</br>";
}
$helloWorld = 'echo "Redefined Hello World: $word\n</br>";';
hello_world('test1');
runkit_function_redefine('hello_world', '$word', $helloWorld);
hello_world('test2');
?>