Regular Expressions 101

Negative Lookbehind(?<!cpc|accounts\.)

1st Alternativecpc

cpcthe literal text cpc (case sensitive)

2nd Alternativeaccounts\.

accountsthe literal text accounts (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

1st Alternativegoogle

googlethe literal text google (case sensitive)

2nd Alternativebing

bingthe literal text bing (case sensitive)

3rd Alternativesearch\.yahoo

searchthe literal text search (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

yahoothe literal text yahoo (case sensitive)

4th Alternativesearch\.myway

searchthe literal text search (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

mywaythe literal text myway (case sensitive)

5th Alternativeyandex

yandexthe literal text yandex (case sensitive)

6th Alternativeduckduckgo

duckduckgothe literal text duckduckgo (case sensitive)

7th Alternativeecosia

ecosiathe literal text ecosia (case sensitive)

8th Alternativesearch\.tb\.ask

searchthe literal text search (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

tbthe literal text tb (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

askthe literal text ask (case sensitive)

9th Alternativebaidu

baiduthe literal text baidu (case sensitive)

Negative Lookahead(?!.*cpc)

.*any character (except for line terminators), repeated any number of times

cpcthe literal text cpc (case sensitive)

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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Search reference

Regular Expression

(?<!cpc|accounts\.)(google|bing|search\.yahoo|search\.myway|yandex|duckduckgo|ecosia|search\.tb\.ask|baidu)(?!.*cpc)

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