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php

    1: --TEST--
    2: ob_start(): Check behaviour with various callback return values.
    3: --FILE--
    4: <?php
    5: function return_empty_string($string) {
    6: 	return "";
    7: }
    8: 
    9: function return_false($string) {
   10: 	return false;
   11: }
   12: 
   13: function return_null($string) {
   14: 	return null;
   15: }
   16: 
   17: function return_string($string) {
   18: 	return "I stole your output.";
   19: }
   20: 
   21: function return_zero($string) {
   22: 	return 0;
   23: }
   24: 
   25: // Use each of the above functions as an output buffering callback:
   26: $functions = get_defined_functions();
   27: $callbacks = $functions['user'];
   28: sort($callbacks);
   29: foreach ($callbacks as $callback) {
   30:   echo "--> Use callback '$callback':\n";
   31:   ob_start($callback);
   32:   echo 'My output.';
   33:   ob_end_flush();
   34:   echo "\n\n";
   35: }
   36: 
   37: ?>
   38: ==DONE==
   39: --EXPECTF--
   40: --> Use callback 'return_empty_string':
   41: 
   42: 
   43: --> Use callback 'return_false':
   44: My output.
   45: 
   46: --> Use callback 'return_null':
   47: 
   48: 
   49: --> Use callback 'return_string':
   50: I stole your output.
   51: 
   52: --> Use callback 'return_zero':
   53: 0
   54: 
   55: ==DONE==