Validating phone numbers with regex
Learn how to validate phone numbers in PHP using preg_match() and regular expressions.
From simple 10-digit checks to formats with country codes — this method keeps your inputs clean and reliable.
🔧 Function: preg_match()
💡 Tip: Use regex like /^\+?\d{1,4}[\s-]?\d{10}$/ to allow international formats.
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