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<?php $pattern = '/^[a-z]{5,8}_(\d{1,2})\.jpg$/'; $names = [ 'asd_1234.jpg', 'asdfg_12.jpg', 'asdfgj_72.jpg', 'as123_1.jpg', 'asdfg_.jpg', 'qweasdfgj_24.jpg', ]; foreach ($names as $entry) { if (preg_match($pattern, $entry, $matches)) { echo "{$entry}: ${matches[1]}\n"; } else { echo "{$entry} doesn't match\n"; } }
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/tg8CA on line 15 asd_1234.jpg doesn't match asdfg_12.jpg: 12 asdfgj_72.jpg: 72 as123_1.jpg doesn't match asdfg_.jpg doesn't match qweasdfgj_24.jpg doesn't match

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