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php

    1: --TEST--
    2: ob_start(): Ensure unerasable buffer cannot be accessed or flushed by ob_get_flush().
    3: --FILE--
    4: <?php
    5: function callback($string) {
    6: 	static $callback_invocations;
    7: 	$callback_invocations++;
    8: 	return "[callback:$callback_invocations]$string\n";
    9: }
   10: 
   11: ob_start('callback', 0, false);
   12: 
   13: echo "This call will fail to flush and fail to obtain the content:\n";
   14: $str = ob_get_flush();
   15: var_dump($str);
   16: ?>
   17: --EXPECTF--
   18: [callback:1]This call will fail to flush and fail to obtain the content:
   19: 
   20: Notice: ob_get_flush(): failed to delete buffer callback in %s on line 11
   21: bool(false)