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I want to use regex to validate my numbers before using them, but it didn't work.
I want the first number to start with0, followed by2 or 5, then4, and the remaining numbers continue to10digits.
^
$
[0]
0
0{1}
[2,5]
[25]
$examples = [ "0241310102", "1241310102", "0541310102", "0551310102", "0241" ]; $pattern = '(^0[25]4[0-9]{7}$)'; foreach ($examples as $example) { echo $example, ": "; if (preg_match($pattern, $example)) { echo "YES", "\n"; } else { echo "NO", "\n"; } }
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^,$).[0]→00{1}→0[2,5]will include commas in character classes →[25]$examples = [ "0241310102", "1241310102", "0541310102", "0551310102", "0241" ]; $pattern = '(^0[25]4[0-9]{7}$)'; foreach ($examples as $example) { echo $example, ": "; if (preg_match($pattern, $example)) { echo "YES", "\n"; } else { echo "NO", "\n"; } }