rest - How to make sure PHP Scripts only run once within a very short amount of time(0.5 - 1sec) -


what doing write php script get's user's email , content want send , use curl_exec initiate session , send server, , server rest based on email service provider associated.

but 1 of our client, when submitting request(forgot password or so), received 2 automated emails(it weird duplicate email triggered when it's first time submitting request of day on pc, after triggered once, no matter how many times submit request, no duplicate email @ all).

i have consulted email service provider(mandrill), , apparently said received 2 api call. , have tested client. have realized after user clicked (lets say) forgot password, 1 rest call sent php server. , how our database received 2 rest calls.

and have tried hard debug it, not solve it. trying implement can stop duplicate emails.

i trying make sure following php script run once within short amount of time(0.5 - 1 sec):

function post_json_and_decode ($url,$username=null,$password=null,$data=null) {     $ch = curl_init($url);     $urldata = "{}";      if ($data === null)         $urldata = '{}';     else         $urldata = json_encode($data, true);      curl_setopt($ch, curlopt_customrequest, "post");     curl_setopt($ch, curlopt_postfields, $urldata);     curl_setopt($ch, curlopt_returntransfer, true);     curl_setopt($ch, curlopt_ssl_verifypeer, false);     curl_setopt($ch, curlopt_ssl_verifyhost, false);     curl_setopt($ch, curlopt_httpheader, array(             'content-type: application/json',             'content-length: ' . strlen($urldata),             $this->create_basic_authorization($username, $password)         )     );      $result = curl_exec($ch);     curl_close($ch);     return json_decode($result,true);  }

and wonder if can shred me light this? have searched lot, , cron doesn't seem solution me.


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