try and catch statement

[adrive]

hi guys, i come from a java background.

I find it quite peculiar that even with the introduction of try and catch blocks(and no finally??) for php, other built in functions of php does not automatically throw an exception. IS there any way to get around this? Even perl has the eval {} method that captures exception from its built in functions.

take for example, im trying to capture all oci errors, but i only throw exception at the end if theres any oci_error. if either one of those oci_bind_by_name doesn't work, it won't throw any exception but a warning, so i can't 'catch' it.

//let's say i have my statement ready as stmt :

try{
if($stmt){
if(oci_bind_by_name($stmt, ":FIELD_A", $subject))
if(oci_bind_by_name($stmt, ":FIELD_B", $subject))
if(oci_bind_by_name($stmt, ":FIELD_C", $subject)){

	if(oci_execute($stmt, OCI_DEFAULT)){

	    oci_commit($conn);

	} else {

                oci_rollback($conn);
	}


    }

    oci_free_statement($stmt);

//capture connection error and throw if found
if(oci_error()) {
	$err = oci_error($conn);
	throw new Exception($err['message']);
}       
}

}
catch{
//do something here
}

[greensweater]

These kinds of function calls will return false on failure. Maybe you could do something like

oci_bind_by_name($stmt, ":FIELD_A", $subject) OR throw new Exception('field a');
oci_bind_by_name($stmt, ":FIELD_B", $subject) OR throw new Exception('field b');
oci_bind_by_name($stmt, ":FIELD_C", $subject) OR throw new Exception('field c');

[Quadodo]

I just tried that on PHP 6 (which they haven't changed this function much) and it won't work, it just returns an error that throw is there for no reason, so do this:

Er yeah it's weird, but they are trying! I mean it's a great language and they don't want to stray too far away from the basic principles 🙂 But you can do something like this:

<?php
function throw_exception($message) {
throw new Exception($message);
}

function do_something() {
return false;
}

try {
do_something() or throw_exception('Function returned false');
}
catch (Exception $e) {
echo $e;
}
?>

That's just an example. You could use the throw_exception() function on the end of your oci_bind_by_name() functions 🙂

[adrive]

:eek: that's what im afraid of..each line of code to manually throw exception 🙁

[laserlight]

I find it quite peculiar that even with the introduction of try and catch blocks(and no finally??) for php, other built in functions of php does not automatically throw an exception. IS there any way to get around this?

Have you considered using the PDO extension with PDO::ERRMODE_EXCEPTION? I agree that the lack of a finally construct is unfortunate, but then PHP5 does have destructors.