You can check if curl is present in a web server, just use the below snipped to check if curl available. Below code will check if curl is available on the server.
<?php
function iscurlinstalled()
{
if (in_array ('curl', get_loaded_extensions())) {
return true;
}
else{
return false;
}
}
?>
Usage:
<?php echo (iscurlinstalled())?'curl found':'no curl found'; ?>

