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php

    1: --TEST--
    2: ob_start(): ensure buffers can't be added from within callback.
    3: --FILE--
    4: <?php
    5: 
    6: /* 
    7:  * proto bool ob_start([ string|array user_function [, int chunk_size [, bool erase]]])
    8:  * Function is implemented in main/output.c
    9: */ 
   10: 
   11: function f($str) {
   12: 	ob_start();
   13: 	echo "hello";
   14: 	ob_end_flush();
   15: 	return $str;
   16: }
   17: 
   18: 
   19: var_dump(ob_start('f'));
   20: echo "done";
   21: ?>
   22: --EXPECTF--
   23: Fatal error: ob_start(): Cannot use output buffering in output buffering display handlers in %s on line 9