验证string是否包含正则表达式字符串

Question

I have the following string below which was extracted by DOM Document:

$scripts = $doc->getElementsByTagName('script');
$script = $scripts->item($i); 
$string = $script->getAttribute('src');// Save the string 'jquery-3.2.0.min.js'

I have 3 ways to check if this string is a jquery:

jquery(?:\\-|\\.)([\\d.]*\\d)[^/]*\\.js\\;version:\\1
/([\\d.]+)/jquery(?:\\.min)?\\.js\\;version:\\1
jquery.*\\.js

In that case how can I validate the above string using one of these 3 commands?

Answer 1

Use preg_match

preg_match — Perform a regular expression match

if (preg_match("/jquery.*\.js/",$string)) {
    echo "Match found";
}

If it finds a match it will print out Match found. (I just used one of your regex strings)

I'm also assuming that $string is what you extracted, because it was hard to tell.

Try it out