- var_dump: documentation ( source)
- array_splice: documentation ( source)
- implode: documentation ( source)
- explode: documentation ( source)
<?php
$filename = 'achieve3000_Gestalt_students102713.txt';
$nameParts = explode('_', $filename);
array_splice($nameParts, 0, 1);
$newName = implode('_', $nameParts);
var_dump($newName);