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  1. #!/bin/bash
  2.  
  3. s="fooFOOfOoFoOBARBARbarbarbAr";
  4. sed -E 's/[Ff][Oo][Oo]|BAR/<&>/g' <<< "$s"
  5.  
Success #stdin #stdout 0.01s 5584KB
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stdin
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Standard input is empty
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<foo><FOO><fOo><FoO><BAR><BAR>barbarbAr
https://ideone.com/JrST8o
language:
Bash (bash 5.0.3)
created:
2 years ago
visibility:
secret

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