PHP add elements together but not Maths

I am trying to add a series of numbers to a string, but not add them up. The following code is adding the numbers up and giving me the result. I want it to simple add them to the string.

<?php foreach ($directions as $direct) {

    $latitude = $direct->start_location->lat; 
    $longitude = $direct->start_location->lng;  

    $dirco开发者_如何学Pythonrds += $latitude.','.$longitude.'|';

    }?><?php echo $dircords?>

Any ideas?

Marvellous

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Use .= instead of +=.

. is the string concatenation operator. + is for additions.

See String operators.