Regular Expressions 101

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\[[^][]*3414a43[^][]*]
/
\[ matches the character [ with index 9110 (5B16 or 1338) literally (case sensitive)
Match a single character not present in the list below
[^][]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
][
matches a single character in the list ][ (case sensitive)
3414a43
matches the characters 3414a43 literally (case sensitive)
Match a single character not present in the list below
[^][]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
][
matches a single character in the list ][ (case sensitive)
] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/

Test String