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<?php $string = "http://www.directcars.co.uk/usedcars/index_pg4.htm"; preg_match("/_pg[0-9]/", $string, $matches, PREG_OFFSET_CAPTURE); $keywords = preg_split("/_pg[0-9]/", "http://www.directcars.co.uk/usedcars/index_pg4.htm"); echo implode("", $keywords); print_r($keywords); print_r($matches);
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
http://www.directcars.co.uk/usedcars/index.htmArray ( [0] => http://www.directcars.co.uk/usedcars/index [1] => .htm ) Array ( [0] => Array ( [0] => _pg4 [1] => 42 ) )

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222.21 ms | 404 KiB | 332 Q