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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T05:22:44+00:00 2026-05-26T05:22:44+00:00

I want to find the most lightweight solution to validate a string as a

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I want to find the most lightweight solution to validate a string as a letter or number + ?. Eg: a? or 1? etc.

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  1. Editorial Team
    Editorial Team
    2026-05-26T05:22:45+00:00Added an answer on May 26, 2026 at 5:22 am
    if (preg_match('/^[a-z0-9]\?$/', $str)) {
        // yup, it's a letter or number + ?
    }
    
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