regex101: PCRE (Legacy) Match Workspace

Regular Expression

<img id="img_viewer" class="border" src='([^']+)'

New

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
<head><title>20141025122402 - HostingPics.net - Hébergement d'images gratuit</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
<meta http-equiv="content-language" content="fr"/>
<meta name="copyright" content="Hostingpics"/>
<meta name="description" content="Image h&eacute;berg&eacute; sur HostingPics: 84550320141025122402.jpg"/>
<meta name="keywords" lang="fr" content="hostingpics, image, hébergeur, partage, photos, 84550320141025122402.jpg"/>
<link rel="stylesheet" href="/style/style-def.css" type="text/css">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="shortcuticon" href="favicon.ico">
<style type="text/css">
body, p, td {
color: #111111;
}
.plusminus {
padding: 1px;
background-color: #F7F7F7;
border: 1px solid #111111;
}
inpu

Substitution

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
<head><title>20141025122402 - HostingPics.net - Hébergement d'images gratuit</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
<meta http-equiv="content-language" content="fr"/>
<meta name="copyright" content="Hostingpics"/>
<meta name="description" content="Image h&eacute;berg&eacute; sur HostingPics: 84550320141025122402.jpg"/>
<meta name="keywords" lang="fr" content="hostingpics, image, hébergeur, partage, photos, 84550320141025122402.jpg"/>
<link rel="stylesheet" href="/style/style-def.css" type="text/css">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="shortcuticon" href="favicon.ico">
<style type="text/css">
body, p, td {
color: #111111;
}
.plusminus {
padding: 1px;
background-color: #F7F7F7;
border: 1px solid #111111;
}
inpu