<?php
 
$strs = ['/Computer-Repair/lancaster-gate-w2.html', '/Computer-Repair/marylebone-w1-w1m-nw1.html', '/Computer-Repair/covent-garden-wc2.html', 'https://w...content-available-to-author-only...o.uk/Computer-Repair/clapham-sw4.html','https://w...content-available-to-author-only...o.uk/Computer-Repair/brixton-sw2.html', 'https://w...content-available-to-author-only...o.uk/Computer-Repair/marylebone-w1-w1m-nw1.html'];
foreach ($strs as $s){
    if (preg_match('~/Computer-Repair/\K[\w-]*?(?=-[a-z]*\d|$)~', $s, $m)) {
        echo preg_replace_callback('~(-)?\b(\w)~', function ($x) { 
        	return (isset($x[1]) && strlen($x[1]) ? " " : "") .  ucfirst($x[2]);
        }, $m[0]) . "\n";
    }
}
 

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