regex for telephone number

Question

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A comprehensive regex for phone number validation

Just a simple regex required to validate telephone numbers.

Must contain only digits, and the other allowable characters are spaces and dashes.

Answer 1

You can use this

\+?[\d -\(\)]*

Answer 2

You can try:

if(preg_match('/^[\d -]+$/',$telNumber)) {
  // valid tel number.
}