使用正则表达式替换PHP的CSS ID或类

Question

I have the following CSS code:

#np-toolbar-l a{ position: relative; padding: 0px 8px; line-height: 30px; display: inline-block; font-size: 12px; }
#np-toolbar-l a:hover{ background-color: #EFEFEF; opacity: 0.7; }
#np-toolbar-l a *:hover{ cursor: pointer; }


/** Icon */
#np-toolbar [class^="icon-"]{ font-size: 18px; vertical-align: middle; margin-right: 5px; }

I am trying to replace np-toolbar to another ID,

I just want to match np-toolbar not np-toolbar-l or something like this,

here's a tutoral about how to capture all the IDs from CSS:

#-?[_a-zA-Z]+[_a-zA-Z0-9-]*(?=[^}]*\{)

source: Regex to match ids in a css file?

I couldn't find out how do I search a "compelete ID" by regex,

here's my example: (It'll still count np-toolbar-l in)

/(?<=(#|\.))(np-toolbar)+(?=( |:||\[))/

EDIT: ummm, jsut added some symbols behind it,

it looks like the answer which I am looking for

/(?<=(#|\.))(np-toolbar)+(?=( |:|\[|\{|\.|,))/

Answer 1

If you're looking for a specific ID, you can greatly simplify your regex:

/(#np-toolbar)(?=[{.,\s])/g

That should find the ID wherever it appears in the CSS. It first matches the ID exactly, then only allows { (for beginning the style), , (for listing selectors), . (for appended classes), or space/tab/newline characters afterwards, preventing it from matching IDs like np-toolbar-1 etc.