How to use try{}catch{} in PHP

This article mainly introduces how to use try{}catch{} in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

The function of try{}catch{} in PHP is to handle exceptions. Error information can be collected and displayed for us. I hope that through the introduction of this article, everyone can master the application of this statement.

There are many syntaxes in the PHP language that we need to be constantly familiar with before we can use them flexibly to write the code programs we need. In this article we will introduce to you the usage of try{}catch{} in PHP.

<?php  
	try { 
		//...	
	} catch(Exception $e) {
		//...
	}
?>

try{}catch{} in PHP is exception handling.

Put the code to be executed into the TRY block. If an exception occurs in a statement during the execution of these codes, the program jumps directly to the CATCH block, and $e collects the error information and displays it.

try{}catch{} statement in PHP

In order to further handle exceptions, we need to use try{}catch{} in PHP----including Try statement and At least one catch statement. Any code that calls a method that may throw an exception should use a try statement. The Catch statement is used to handle exceptions that may be thrown.

The following shows how we handle exceptions thrown by getCommandObject():

<?php  
	try {  
		$mgr = new CommandManager();  
		$cmd = $mgr->getCommandObject("realcommand");  
		$cmd->execute();  
	} catch (Exception $e) {  
		print $e->getMessage();  
		exit();  
	}  
?>

Okay See, by using the throw keyword in conjunction with try{}catch{} in PHP, we can avoid "polluting" the values ​​returned by class methods with false flags. Because "exception" itself is a PHP built-in type that is different from any other object, there will be no confusion.

If an exception is thrown, the script in the try statement will stop executing, and then immediately switch to executing the script in the catch statement.

If an exception is thrown but is not caught, a fatal error will be generated.

The above is the entire content of this article, I hope it will be helpful to everyone's study.

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