PayPal website Payment Standard version for PHP

Simply organize your PHP project to integrate PayPal payment functionality.

One, the construction of the form:

<formMethod= "POST"name= "form"Action= "HTTPS://WWW.PAYPAL.COM/CGI-BIN/WEBSCR"><inputtype= "hidden"name= "rm"value= "2"/><inputtype= "hidden"name= "cmd"value= "_xclick"/><inputtype= "hidden"name= "Business"value= "Merchant Account"/><inputtype= "hidden"name= "return"value= "Return url"/><inputtype= "hidden"name= "Cancel_return"value= "Cancel return url"/><inputtype= "hidden"name= "Notify_url"value= "URL to receive instant payment notifications sent by PayPal, must be a valid URL"/><inputtype= "hidden"name= "Item_name"value= "Item Name"/><inputtype= "hidden"name= "Item_Number"value= "can be used to track purchases or donations of transfer variables that are returned to you when payment is completed"/><inputtype= "hidden"name= "Amount"value= "The price of the item (the total price of all items in the shopping cart" )/><inputtype= "hidden"name= "Currency_code"value= "Currency"/> 
    form> 
 

Second, the IPN verification part

 PhpclassPayPal {var$paypal _url= ' HTTPS://WWW.PAYPAL.COM/CGI-BIN/WEBSCR ';//SANDBOX:HTTPS://WWW.SANDBOX.PAYPAL.COM/CGI-BIN/WEBSCRvarValidate_ipn_response; functionVALIDATE_IPN () {//Verify IPN//Parse the PayPal URL$url _par=Parse_url($this-Paypal_url); //generate the Post string from the _post VARs aswell as load the//_post VARs to an arry so we can play with them from the calling//script.$post _str= ''; foreach($_post as$field=$value) {$this->ipn_data["$field"] =$value; $post _str.=$field.' ='.UrlEncode(stripslashes($value)).' & '; }$post _str. = "Cmd=_notify-validate";//Append IPN command//Open the connection to PayPal$fp=Fsockopen($url _par[Host], "80",$errnum,$errstr, 30); if(!$fp) {//could not open the connection.returnfalse; } Else{//Post The data back to PayPalfputs($fp, "POST".$url _par[Path]. " Http/1.1\r\n "); fputs($fp, "Host:".$url _par[Host]. \ r \ n "); fputs($fp, "content-type:application/x-www-form-urlencoded\r\n"); fputs($fp, "Content-length:".strlen($post _str)." \ r \ n "); fputs($fp, "connection:close\r\n\r\n"); fputs($fp,$post _str. "\r\n\r\n"); //Loop through the response from the server and append to variable while(!feof($fp)) {$this->validate_ipn_response. =fgets($fp, 1024); }fclose($fp);//Close Connection}if(Eregi("Verified",$this-validate_ipn_response)) {returntrue; } Else{returnfalse; }　　}
}?>

Information:
Developer: https://developer.paypal.com/
Instant Payment Notice: https://www.paypal-biz.com/development/documentation/PayPal_IPN&PDT_Guide_V1.0.pdf
PayPal Standard Version: Https://www.paypal-biz.com/development/documentation/PayPal_WPS_Guide_CN_V2.0.pdf

The above describes the PayPal website payment Standard version for PHP, including the aspects of the content, I hope the PHP tutorial interested in a friend helpful.

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