Positive value expression matches the attribute value of html tag, expression attribute value_PHP tutorial

Positive expression matches the attribute value of the html tag, and the expression attribute value

Today, due to work requirements, I need to obtain the attribute value of the html tag, and I immediately thought of regular expressions , the tags are as follows:

< ;circle id="ap_test" cx="201" cy="2001" r="2" stroke="black" stroke-width="0" fill="red"/>

I need to get the cx and cy attribute values ​​​​of the tag. I thought for a while and wrote one:

$circle is the content of the circle tag above

preg_match_all('/]*?cxs*=s*('|")(.*?)\1[^>]*?cys*=s *('|")(.*?)\1[^>]*?/?s*>/i', $circle, $arr);

var_dump($arr);

$arr[2] is the value of cx, $arr[4] is the value of cy.

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http://www.bkjia.com/PHPjc/1102844.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1102844.htmlTechArticlePositive expression matches the attribute value of the html tag. The expression attribute value needs to be obtained due to work requirements today. For the attribute value of the label, regular expressions immediately come to mind. The label is as follows:...