How to implement area code verification in php

php method to implement area code verification: 1. Create a new php file; 2. Set the encoding format of the page to utf8; 3. Create a regular expression to match the specified area code; 4. Use regular expressions Match the phone number with the formula, then use if to determine whether the match is successful, and output the prompt content.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

How to implement area code verification in php?

php determines whether the phone number starts with the specified area code

Create a new php file, named test.php, to explain how php determines whether the phone number starts with the specified area code .

In the test.php file, use the header() method to set the encoding format of the page to utf-8 to avoid garbled characters when the page outputs Chinese.

In the test.php file, create a regular expression that matches the specified area code, for example, matches numbers starting with "010".

In the test.php file, store the test phone in the $phone variable.

In the test.php file, use the preg_match function to match the phone number with a regular expression, and then use if to determine whether the match is successful and output the prompt content.

Open the test.php file in the browser to view the results.

Recommended study: "PHP Video Tutorial"

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