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What is Exception Handling in PHP ?
An exception is a problem that arised during the execution of a program. During the execution of a program when an exception occurs, code following the statement will not be executed, and PHP will attempt to find the first matching catch block. If an exception is not caught, a PHP Fatal Error will be issued with an “Uncaught Exception”.
Syntax
try {
print "this is our try block";
throw new Exception();
}catch (Exception $e) {
print "something went wrong, caught yah! n";
}finally {
print "this part is always executed";
}Example
<?php
function printdata($data) {
try {
//If var is six then only if will be executed
if($data == 6) {
// If var is zero then only exception is thrown
throw new Exception('Number is six.');
echo "
After throw (It will never be executed)";
}
}
// When Exception has been thrown by try block
catch(Exception $e){
echo "
Exception Caught", $e->getMessage();
}
//this block code will always executed.
finally{
echo "
Final block will be always executed";
}
}
// Exception will not be rised here
printdata(0);
// Exception will be rised
printdata(6);
?>Output
Final block will be always executed Exception CaughtNumber is six. Final block will be always executed
Note
To handle exceptions, program code must inside a try block. Each try must have at least one respective catch block. Multiple catch blocks can be used to catch different classes of exceptions.
Updated on: 29-Jun-2020
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