RegEx正则表达式获取ID

Question

Given a string of the following:

• [download id="1"]
• [download id="1" attr=""]
• [download attr="" id="1"]
• [download attr="" id="1" attr=""]

ID is always a number. I need a regular expression that will always give me that number to be used via PHP preferably demonstrated via http://www.solmetra.com/scripts/regex/index.php.

Answer 1

try this one:

/\[download.*?id=\"(\d+)\"/

Function called:

preg_match_all('/\[download.*?id=\"(\d+)\"/', '{{your data}}', $arr, PREG_PATTERN_ORDER);