查找字符串的正则表达式

Question

Can anyone help me with finding regular expression for the below

$string = "id=A12dk9-mds&name=4950";

I need to find regular expression to find a dynamic value (A12dk9-mds in this example).

i.e the dynamic content between = and &

Answer 1

A simple regex can be used for that.

/id=([^&]*)&/

Explanation:

• id= matches id=
• ([^&]*) matches anything but the & symbol as much as possible and returns that
• & matches the &

As long as you know they will always be between a = and a & this will work.

PHP Code:

$string = "id=A12dk9-mds&name=4950";
preg_match('/id=([^&]*)&/',$string, $answer);
print_r($answer[1]);