ini_restore

    (PHP 4, PHP 5, PHP 7, PHP 8)

    ini_restore — 恢复配置选项的值

    说明

    ini_restore(string $option): void

    恢复指定的配置选项到它的原始值。

    参数

    option

    配置选项名称。

    返回值

    没有返回值。

    示例

    示例 #1 ini_restore() 示例

    <?php
    $setting     = 'html_errors';

    echo     'Current value for \'' . $setting . '\': ' . ini_get($setting), PHP_EOL;

    ini_set($setting, ini_get($setting) ? 0 : 1);
    echo     'New value for \'' . $setting . '\': ' . ini_get($setting), PHP_EOL;

    ini_restore($setting);
    echo     'Original value for \'' . $setting . '\': ' . ini_get($setting), PHP_EOL;
    ?>

    以上示例会输出：

    Current value for 'html_errors': 1
New value for 'html_errors': 0
Original value for 'html_errors': 1

    参见

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    4
    Anonymous
    8 years ago
    If like me you thought ini_restore() would restore to the most recent setting rather than the startup value, you could use this.

    <?php

    /**
    * Executes a function using a custom PHP configuration.
    *
    * @param array $settings A map<ini setting name, ini setting value>.
    * @param callable $doThis The code to execute using the given settings.
    * @return mixed Returns the value returned by the given callable.
    */
    function ini_using_do(array $settings, callable $doThis){
    foreach(    $settings as $name => $value){
    $previousSettings[$name] = ini_set($name, $value);
    }
    $returnValue = $doThis();
    if(isset(    $previousSettings)){
    foreach(    $previousSettings as $name => $value){
    ini_set($name, $value);
    }
    }
    return     $returnValue;
    }

    ?>
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