Online PHP editor | output for OPrPa

@ 2013-11-14T10:46:42Z

<?php

function benchmarkMemory(callable $function, $args=null)
{
   declare(ticks=1);
   global $_memory, $_max;
   $_memory = memory_get_usage();
   $_max    = 0;
   if(!function_exists('functionWithNoName'))
   {
      function functionWithNoName()
      {
         global $_memory, $_max;
         $_memory = memory_get_usage() - $_memory;
         $_max    = $_memory>$_max?$_memory:$_max;
         $_memory = memory_get_usage();
      }
   }
   register_tick_function('functionWithNoName');
   $result = is_array($args)?
             call_user_func_array($function, $args):
             call_user_func_array($function);
   unregister_tick_function('functionWithNoName');
   return [
      'memory' => $_max
   ];
}

var_dump(benchmarkMemory('str_repeat', ['test',1E4]));//0
var_dump(benchmarkMemory('str_repeat', ['test',1E3]));//0

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.24, 7.3.0 - 7.3.12: array(1) { ["memory"]=> int(40960) } array(1) { ["memory"]=> int(4096) }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28: array(1) { ["memory"]=> int(40072) } array(1) { ["memory"]=> int(4072) }
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/OPrPa on line 24
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/OPrPa on line 24
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/OPrPa on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_STRING, expecting ')' in /in/OPrPa on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/OPrPa on line 3
Process exited with code 255.

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