Regular Expressions 101

1st Alternative(<.*?(?=mensagem).*?>)(.*?)(<.*?>)

Group 1(<.*?(?=mensagem).*?>)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

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

Positive Lookahead(?=mensagem)

mensagemthe literal text mensagem (case sensitive)

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

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Group 2(.*?)

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

Group 3(<.*?>)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

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

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative(.*)

Group 4(.*)

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

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(<.*?(?=mensagem).*?>)(.*?)(<.*?>)|(.*)

New

<span id="mensagem" class="topo">Classes e comandos</span>
<sfdfsdpan id="mendsagem" class="topo">Classes e comandos</span>
<s4856461pan id="mensagem" class="topo">AAAAAA</span>
<span id="meaaaaansagem" class="topo">VOU APRENDER REGEX</span>
<span id="mensagem" class="topo">H1234Ç.,w^</span>
<span id="mensagem" class="topo">VOU APRENDER REGEX</span>

Substitution

$2