What should I do if the php regular expression cannot be matched?

Solution to the problem that php cannot match the regular pattern: 1. Use the preg_match_all() function to obtain the regular matching content; 2. Output the matching content through print_r.

The operating environment of this article: Windows7 system, PHP7.1 version, DELL G3 computer

Specific questions:

php正则匹配不到  为什么我这个一个也匹配不到呢？

Solution:

1. To obtain the content matched by the regular expression, you should use the preg_match_all() function

2. It is an array. Arrays cannot be output using echo. If echo outputs an array, it will only display Array

. Recommended study: "PHP Video Tutorial"

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