23 lines
848 B
Markdown
23 lines
848 B
Markdown
---
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title: Error Exceptions
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---
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## Error Exceptions
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Similar to other programming languages, you generally want to throw Exceptions when some sort of error occurs. Consider the following example of a `withdraw()` function in a theoretical `BankAccount` class where the balance goes below 0:
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```php
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function withdraw($amount) {
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$newBalance = $this->balance - $amount;
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if ($newBalance < 0) {
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throw new Exception('Balance would go below zero');
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}
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return $newBalance;
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}
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```
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In this case, if the value of ```$this->balance``` was 5 and ```$amount``` was 10, you wouldn't want to authorize the withdrawal. By throwing an Exception, you ensure that the withdrawal doesn't take place if there is not enough money in the account.
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#### More Information
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- [PHP Manual: Exceptions](http://php.net/manual/en/language.exceptions.php)
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