- var_dump: documentation ( source)
- array_search: documentation ( source)
- implode: documentation ( source)
- explode: documentation ( source)
<?php
$txt = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam.";
$word = "ipsum";
$txtArr = explode(" ", $txt);
$i = array_search($word, $txtArr);
unset($txtArr[$i + 2]);
unset($txtArr[$i + 1]);
var_dump(implode(" ", $txtArr));