removing 'width' attribute from image tag using preg_replace

my site users are using WYSWYG editor .. they insert image like
<img src="http://www.techie-diva.com/images/myimg.jpg" width="500" height="200" />
I want to remove width="<some value>" and height attribute from the tag before insert data into database
is preg_replace or any other php function will help me to cut if off ?
amitbravoAsked:
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shanikawmCommented:
Try this
preg_replace('/(width|height)="[^"]*"/i','',$imgtag)

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amitbravoAuthor Commented:
but this way this can remove attribute of other tags such as table , etc . i only need  to remove tag of <img src.. tag only
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shanikawmCommented:
Then you can use something like this.
<?
$text='<img src="http://www.techie-diva.com/images/myimg.jpg" width="500" y="d" height="200" a="e" b="4" />
<table heght="200" width="678"></table>
<img src="http://www.techie-diva.com/images/myimg.jpg" width="500" height="200" />';
echo preg_replace("!(<img)([^<>]+)(/>)!e","'\\1'.preg_replace('!(height|width)=\"[^\"]*\"!i','',\"\\2\").'\\3'",$text),"\n";
?>

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