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How to create a function in PHP

I am trying to create a function called saveorder . This is my code:

 <?php //function foo($arg_1, $arg_2, /* ..., */ $arg_n) function saveorder($orderid,$txnid,$date,$amount) { $a_str = array( "orderid"=>"175", "txnid"=>"RC456456456", "date"=>"54156456465", "amount"=>"109$" ); $file = 'order.dat'; $contents = implode("|", $a_str); $contents .= PHP_EOL . PHP_EOL; file_put_contents($file, $contents); } echo "function will return=".saveorder($orderid); ?>

I think I am doing it wrong because I never created my own function. However, I want to create this function to keep order in the order.dat file. Can someone help me create this feature? I try very hard, but I can’t create it.

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you didn’t have a return, otherwise the function is fine :)

 function saveorder($orderid,$txnid,$date,$amount){ $a_str = array( "orderid"=>$orderid, "txnid"=>$txnid, "date"=>$date, "amount"=>$amount ); $file = 'order.dat'; $contents = implode("|", $a_str); $contents .= PHP_EOL; file_put_contents($file, $contents, FILE_APPEND); return $contents; } echo "function will return=".saveorder("175","RC456456456","54156456465","109$");

EDIT: added FILE_APPEND

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In fact, you did not return any value to your function, so it really worked correctly.

You need to add, for example, the next element at the end of the function

 <?php function saveorder($orderid,$txnid,$date,$amount) //function foo($arg_1, $arg_2, /* ..., */ $arg_n) { $a_str = array( "orderid"=>"175", "txnid"=>"RC456456456", "date"=>"54156456465", "amount"=>"109$" ); $file = 'order.dat'; $contents = implode("|", $a_str); $contents .= PHP_EOL . PHP_EOL; res = file_put_contents($file, $contents); if(res){ return true; } else { return false; } } echo "function will return=".saveorder($orderid); ?>
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