The **`strlen()` function** in PHP is used to calculate the size of a string. 

The illustration below shows the mathematical representation of the `strlen()` function.

# 
## Syntax
```php
strlen(string)
```
## Parameters
The `strlen()` function requires a `string` as a parameter.

## Return value
This function returns the size of a `string`.
## Code

<?php
echo("The size of string 'hello': ");
echo(strlen("hello"));
echo("\n");

echo("The size of string 'educative': ");
echo(strlen("educative"));
?>	

What is strlen() in PHP?

Syntax

Parameters

Return value

Code