Application of regular expressions in PHP

: This article mainly introduces the application of regular expressions in PHP. For more information about PHP tutorials, see. This program implements a Demo of logon verification using a regular expression.

<1>:

 ";} Else if ($ x <10) {$ y = 2 * $ X-1; echo" y = ". $ y ."
";} Else {$ y = 3 * $ X-11; echo" y = ". $ y ."
";}}?> <2>:

The above introduces the application of regular expressions in PHP, including some content, and hopes to help those who are interested in PHP tutorials.