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Cannot use output buffering in output buffering display handlers

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长发绾君心
长发绾君心 2021-01-17 17:24

I\'ve reinstalled Apache, and switched from PHP 5.3 to 5.6. Everything works, except I get this error, when calling ob_start():

Cannot use outpu
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3条回答
  • 渐次进展
    2021-01-17 18:02

    Probably you are using a buffering function in output buffering callback which isn't possible as mentioned in php ob_start output_callback documentation. If not it should be the output-handler you used, check your php.ini and try to set it's value to "none" if possible.

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  • 耶瑟儿～
    2021-01-17 18:10

    You're trying to start a output buffer inside a buffer callback. If you use this code, it will generate that error. But if you remove the ob_start() from the callback function it's OK.

    <?php
error_reporting(-1);

function callback($buffer){
    //you can't call ob_start here
    ob_start();
    return (str_replace("apples", "oranges", $buffer));
}

ob_start("callback");

?>
<html>
<body>
<p>It's like comparing apples to oranges.</p>
</body>
</html>
<?php
ob_end_flush();
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  • 星月不相逢
    2021-01-17 18:14

    maybe this sample code can help you:

    ob_start();
echo "test";
$content = ob_get_contents();
ob_end_clean();
var_dump($content);
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