Online PHP editor | output for TelNe

@ 2013-11-14T11:00:33Z

<?php

function benchmarkMemory(callable $function, $args=null)
{
   declare(ticks=1);
   $memory = memory_get_usage();
   $max    = 0;
   if(!class_exists('classWithNoName'))
   {
      class classWithNoName
      {
         public static $memory, $max;
         public function __invoke()
         {
            self::$memory = memory_get_usage() - self::$memory;
            self::$max    = self::$memory>self::$max?self::$memory:self::$max;
            self::$memory = memory_get_usage();
         }
         
         public function __toString()
         {
            return __CLASS__;
         }
      }
      classWithNoName::$memory = memory_get_usage();
      classWithNoName::$max    = 0;  
   }
   register_tick_function('classWithNoName');
   $result = is_array($args)?
             call_user_func_array($function, $args):
             call_user_func_array($function);
   unregister_tick_function('classWithNoName');
   return [
      'memory' => $max
   ];
}

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

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.17 - 7.2.25, 7.3.0 - 7.3.12, 7.4.0: Warning: register_tick_function(): Invalid tick callback 'classWithNoName' passed in /in/TelNe on line 28 array(1) { ["memory"]=> int(0) } Warning: register_tick_function(): Invalid tick callback 'classWithNoName' passed in /in/TelNe on line 28 array(1) { ["memory"]=> int(0) }
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/TelNe on line 33
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/TelNe on line 33
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/TelNe 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/TelNe on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/TelNe on line 3
Process exited with code 255.

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