douchujian8124 2015-09-20 21:20 采纳率: 100%
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输出缓冲区错误处理

Let us assume that an easy snippet is used for templating and is using output control (ob)

public function capture($file, array $args = array())
{
    extract($args, EXTR_SKIP);

    ob_start();

    require $file; //'foo.php'

    return ob_get_clean();
}

And foo.php that has an error (handled by an error handler and shutdown handler)

<?php

echo "before";
echo $someVariable; //$someVariable is undefined here
echo "after";

Output

before <- would like to avoid
some message from the error handler

The question: is it possible to avoid any output from the file upon error?

Yes,

  • 写回答

1条回答 默认 最新

  • dongyanfeng0563 2015-09-20 22:16
    关注

    If you use the shutdown handler rather than the error handler it can clear the output because the error handler can only clear the output before it so anything outputted after it will still render.

    <?php
    
    function error_handler()
    {
        if(error_get_last()) {
            ob_get_clean();
            echo 'An error has occured.';
        }
    }
    
    register_shutdown_function('error_handler');
    
    function capture()
    {
        ob_start();
    
        require 'foo.php';
    
        return ob_get_clean();
    }
    
    echo capture();
    
    // foo.php
    <?php
    
    echo 'before';
    echo $variable;
    echo 'after';
    
    ?>
    

    This will only output 'An error has occured.'

    however using set_error_handler it will output 'An error has occured.after' unless you add a DIE() or something similar to the error handler.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

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