<?php  
define("PHP_SHELL_EXECUTION_PATH", "path/to/php"); 
$crawOptions = array( 
    'target' => 'https://example.com', 
    'max' => 50, 
); 
$crawRequest = base64_encode(serialize($crawOptions)); 
$crawScript =  __DIR__ . "/craw.php"; 
$crawLogs =  __DIR__ . "/craw_logs.log"; 
shell_exec(PHP_SHELL_EXECUTION_PATH . " " . $crawScript . " " . $crawRequest ." 'alert' >> " . $crawLogs . " 2>&1"); 
 
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