regular expression modifiers

Previously, we introduced the delimiters, atoms, and metacharacters in regular expressions, so the basic syntax of the regular expression tutorial leaves the pattern modifier in the regular expression. This section describes the concept of a pattern

Previously, we introduced the delimiters, atoms, and metacharacters in regular expressions, so the basic syntax of the regular expression tutorial leaves the pattern modifier in the regular expression. This section describes the concept of a pattern

When using regular expressions in PHP, there are some differences from other languages, one of which is that PHP has a regular modifier (qualifier). We encounter modifiers in the learning of PHP regular expressions, so what do we need to note about

RegExp Direct volume and creation of objects As with strings and numbers, it is obvious that the original type of direct quantity for each value in the program represents the same value. A new object is created each time the program runs with the

Before learning the PHP regular expression modifier, first to understand the greedy mode, before the meta-character mentioned in the "?" There is also an important role, namely "greedy mode", what is "greedy mode"? PHP Regular Expression greedy

Finally, csdn was chosen to sort out the knowledge points published over the past few years. This article was migrated to csdn in parallel. Because csdn also supports the markdown syntax, it's awesome! [Craftsman's water:

PHP regular expression syntax reprinted from: http://blog.csdn.net/kkobebryant/article/details/267527 Basic regular expression syntax First, let's take a look at two special characters: '^' and '$'. they are used to match the start and end of the

Modifier is an important reference for regular expressions in php. Next I will explain the Regular Expression Pattern modifier in PHP, for more information, see references. The PHP pattern modifier, also known as the pattern modifier, is used

On the modifiers in PHP regular expressions/I,/is,/S,/isu, regular expressions IsU Before learning the PHP regular expression modifier, first to understand the greedy mode, before the meta-character mentioned in the "?" There is also an important

Reprinted from: http://blog.csdn.net/kkobebryant/article/details/267527 Basic syntax for regular expressions First, let's take a look at two special characters: ' ^ ' and ' $ ' they are used to match the beginning and end of the string,