The **`strtolower()` function** in PHP converts a string to lowercase. 

The following figure shows a visual representation of the `strtolower()` function.

#    
#  Syntax
```php
string strtolower(string)
```
#      
#  Parameter
As a parameter, the `strtolower()` function requires a string that is to be converted to lowercase.

##   
## Return value
The `strtolower()` function returns a string that is converted to lowercase.  

##   
## Code

The code below shows how the `strtolower()` function works in PHP.





<?php
#string
echo("strtolower('EDUCATIVE'): ");
echo (strtolower('EDUCATIVE'));
echo("\n");
#string with number
echo("strtolower('EDUCATIVE09'): ");
echo (strtolower('EDUCATIVE09'));
?>

What is strtolower() in PHP?

Converts a string to lowercase using the strtolower() function in PHP. Returns the lowercase string.