How to remove extra symbols from CURL in PHP? -

i have simple curl request socket, returns process pid. problem there chars/symbols witch unseen. code is:

for ($i = 0; $i < 3; $i++ ) {     $ch = curl_init($server);      curl_setopt($ch, curlopt_ssl_verifyhost, 0);     curl_setopt($ch, curlopt_ssl_verifypeer, 0);     curl_setopt($ch, curlopt_post, 1);     curl_setopt($ch, curlopt_postfields, '<ping></ping>');     curl_setopt($ch, curlopt_returntransfer, 1);     curl_setopt($ch, curlopt_connecttimeout ,0);      curl_setopt($ch, curlopt_timeout, 400);      $output = array(         'result' => curl_exec($ch),         'info' => curl_getinfo($ch),         'error' => curl_error($ch)     );      curl_close($ch);      var_dump($output['result']);     var_dump(trim($output['result']));     var_dump($pid);     echo "----------------\n";      if (trim($output['result']) == $pid)         die('true');      sleep(2); }   die('false'); 

output looks like:

bool(false)
string(0) ""
string(5)
"14262"
----------------
string(7) "14262"
string(7) "14262"
string(5) "14262"
----------------
string(7) "14262"
string(7) "14262"
string(5) "14262"
----------------
false

try use.

if (strcmp(trim($output['result']), $pid) == 0)     die('true');