php - Is the third htmlspecialchars parameter ($encoding) case-sensitive? -


i came across user-contributed note (upvoted 7 times) on php manual page htmlspecialchars has me confused.

be careful, "charset" argument case sensitive. counter-intuitive , serves no practical purpose because html spec has opposite.

now, realize there no difference between iso-8859-1, iso-8859-15, utf-8, cp866, cp1251, cp1252, , koi8-r purposes of htmlspecialchars.

but had me wondering htmlentities , html_entity_decode since have same parameters. i'm on php 5.3 default iso-8859-1. did testing windows-1252, windows-1252, utf-8, , utf-8. in cases, got expected results characters exist in tested character set.

so wondered whether or not note

  • applies versions
  • applies htmlspecialchars
  • is wrong

i tried digging source, couldn't find way around. i'm concerned behavior of html_entity_decode across different versions because use convert user-supplied html plain text.


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