regex101: PCRE (Legacy) Match Workspace

Non-Capturing Group(?:'|")

1st Alternative'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

2nd Alternative"

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 1([^"':]*?\.(?:png|jpe?g|gif)[^'"]*(?=[^<]+?>))

Negated Character Class[^"':]*?

*?matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:png|jpe?g|gif)

1st Alternativepng

pngthe literal text png (case sensitive)

2nd Alternativejpe?g

jpthe literal text jp (case sensitive)

e?optionally matches the literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

gthe literal g (103₁₀ / 147₈ / 67₁₆) (case sensitive)

3rd Alternativegif

gifthe literal text gif (case sensitive)

Negated Character Class[^'"]*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Positive Lookahead(?=[^<]+?>)

Negated Character Class[^<]+?

+?matches at least one character outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Search reference

Regular Expression

(?:'|")([^"':]*?\.(?:png|jpe?g|gif)[^'"]*(?=[^<]+?>))

New

TO MATCH:
<img src="images/vendor.png" alt="" > <img src="images/vendor.gif" class="box-bg-image" alt="" >
<img src="images/vendor-dp-20141009-flatware.jpg" class="box-bg-image" alt="" >
<img src="images/vendor-flatware.jpeg" class="box" alt="" >
<img src='images/vendor-flatware.jpeg' class="box" >
<img alt="" src= 'images/vendor-flatware.jpeg' alt="" >
<img src=' images/vendor-flatware.jpg' alt="" >
<img src=' images/vendor-flatware.gif' alt="" >
<img src=' images/vendor-flatware.png ' alt="" >
<img src='../silverware.png' alt="" >
<img class="box" src='images/vendor-watch.png' alt="" >
<img src=" images/vendor-flatware.jpeg " alt="" >
< img  src="images/vendor-flatware.jpeg " alt="" >
< img  src="images/vendor-flatware.jpeg " alt="" >
<img src="vendor.gif" alt="">


NOT TO MATCH:
<img src="http://thirdpartycdn.com/image.jpg">
<img src='http://thirdpartycdn.com/image.png'>
<img src="http://thirdpartycdn.com/image.gif" class="box-bg-image" alt="">
img src="images/vendor-flatware.jpeg "
<img src="images/vendorpng" alt="" >

Regular Expressions 101

Regular Expression

Substitution