Delete first 3 characters and last 3 characters from String PHP

Pass a negative value as the length argument (the 3rd argument) to substr(), like:

$result = substr($string, 3, -3);

So this:

<?php
$string = "Sean Bright";
$string = substr($string, 3, -3);
echo $string;
?>

Outputs:

n Bri

Use

substr($var,1,-1)

this will always get first and last without having to use strlen.

Example:

<?php
    $input = ",a,b,d,e,f,";
    $output = substr($input, 1, -1);
    echo $output;
?>

Output:

a,b,d,e,f

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