function exec_callback($command, $callback){ $array = array(); exec($command, $array, $ret); if(!empty($array)){ foreach ($array as $line){ call_user_func($callback, $line); } } } // example to use function print_lines($line){ echo "> $line\n"; } exec_callback("ping -c 10 www.baidu.com 2>&1 &", 'print_lines');
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