runkit7_function_redefine

    (PECL runkit7 >= Unknown)

    runkit7_function_redefine — Replace a function definition with a new implementation

    说明

    runkit7_function_redefine(
        string $function_name,
        string $argument_list,
        string $code,
        bool $return_by_reference = null,
        string $doc_comment = null,
        string $return_type = ?,
        bool $is_strict = ?
    ): bool
    runkit7_function_redefine(
        string $function_name,
        Closure $closure,
        string $doc_comment = null,
        string $return_type = ?,
        bool $is_strict = ?
    ): bool

    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。

    参数

    function_name
    Name of function to redefine
    argument_list
    New list of arguments to be accepted by function
    code
    New code implementation
    closure
    A closure that defines the function.
    return_by_reference
    Whether the function should return by reference.
    doc_comment
    The doc comment of the function.
    return_type
    The return type of the function.
    is_strict
    Whether the function behaves as if it was declared in a file with strict_types=1

    返回值

    成功时返回 true， 或者在失败时返回 false。

    示例

    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

    参见

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