The **`max()` function** in PHP returns the maximum value in an array or from a series of values. 

The illustration below shows the visual representation of the `max()` function.

#   
## Syntax
```php
max(value-1, value-2, value-3...value-n)
or 
max(array)
```
## Parameters
The `max()` function requires either an `array` or a `series of values` separated by commas.

## Return value
This function returns the maximum value in an array or from a series of values.
## Code

<?php
#series of values
echo("max(1,5,3,7,0): ");
echo (max(1,5,3,7,0));
echo("\n");

echo("max(1,-5,3,-7,0): ");
echo (max(1,-5,3,-7,0));
echo("\n");

#array
echo("max(array(-1,-5,-3,-7,0)): ");
echo (max(array(-1,-5,-3,-7,0)));
echo("\n");

echo("max(array(-1,5,-3,7,0)): ");
echo (max(array(-1,5,-3,7,0)));
echo("\n");
?>	


What is max() in PHP?

The max() function in PHP returns the maximum value from an array or a series of values.