Positive expressions Match HTML Tag property values, expression property values _php Tutorial

A positive expression matches the property value of an HTML tag, and the Expression property value

Today, due to the needs of the work, we need to get the attribute value of the HTML tag, immediately think of the regular expression, labeled as follows:

Need to get the value of the label's CX, CY attribute, and then write out a:

$circle is the contents of the circle tag above

Preg_match_all ('/<\s*circle\s+[^>]*?cx\s*=\s* (\ ' |\ ') (. *?) \\1[^>]*?cy\s*=\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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