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@ 2020-05-05T07:32:31Z

<?php

$string = <<<EOT
195/50R16
EOT;

$matches = [];
preg_match('~^\d+/\d+R(?P<return>\d+)~', $string, $matches);

var_dump($matches);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_match: documentation ( source)

preferences:dark modelive previewkey bindings

114.55 ms | 2722 KiB | 5 Q