22 lines
487 B
Markdown
22 lines
487 B
Markdown
---
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title: Checking Required Inputs
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---
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## Checking Required Inputs
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PHP has a few functions to check if the required inputs have been met. Those functions are ```isset```, ```empty```, and ```is_numeric```.
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### Checking form to make sure its set
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The ```isset``` checks to see if the field has been set and isn't null.
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Example:
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```php
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$firstName = $_GET['firstName']
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if(isset($firstName)){
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echo "firstName field is set". "<br>";
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}
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else{
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echo "The field is not set."."<br>";
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}
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```
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