(PECL runkit7 >= Unknown)
runkit7_function_redefine — Replace a function definition with a new implementation
$function_name,$argument_list,$code,$return_by_reference = null,$doc_comment = null,$return_type = ?,$is_strict = ?$function_name,$closure,$doc_comment = null,$return_type = ?,$is_strict = ?注意: 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。
function_nameName of function to redefine
argument_listNew list of arguments to be accepted by function
codeNew code implementation
closureA closure that defines the function.
return_by_referenceWhether the function should return by reference.
doc_commentThe doc comment of the function.
return_typeThe return type of the function.
is_strict
Whether the function behaves as if it was declared in a file with strict_types=1
示例 #1 A runkit7_function_redefine() example
<?php
function testme() {
echo "Original Testme Implementation\n";
}
testme();
runkit7_function_redefine('testme','','echo "New Testme Implementation\n";');
testme();
?>以上示例会输出：
Original Testme Implementation New Testme Implementation