Regular expression for extracting the value of the SRC attribute of an IMG element

This article introduces you to the link address of the SRC attribute value if you get the picture from IMG.

The string to match:

Regular Expressions:

[^ '" "]*) [\ '"]) | (? <src>[^\s]*))
Regular match output results:

Ximage/ad1.gifimage/ad2.gif
PHP regular extract or the SRC attribute value of the IMG element:

<?php/*php Extract any attribute in the IMG tag */$str = ' <center>php extract or change any of the attributes in the IMG tag of the image </center> '; 1, take the entire picture code Preg_match ('/<\s*img\s+[^>]*?src\s*=\s* (\ ' |\ ') (. *?) \\1[^>]*?\/?\s*>/i ', $str, $match); echo $match [0]; 2, take width preg_match ('//i ', $str, $match); echo $match [1]; 3, take height Preg_match ('//i ', $str, $match); echo $match [1]; 4, take src preg_match ('//i ', $str, $match); echo $match [1]; /*php Replace any attribute *///1 in the image img tag, replace src= "/uploads/images/20100516000.jpg" with src= "/uploads/uc/images/20100516000.jpg") Print Preg_replace ('/()/I ', "\${1}uc/images/\${3}", $STR); echo "
JS Regular expression Extract image address

Regular Expressions <script language= "JavaScript" >
var a= ' <p></P>"
var b=//gi var s=a.match (b) for (Var i= 0;i<s.length;i++) {alert (s[i]); alert (regexp.$1)} </script>
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