what's the difference between case_Sensitive and case insensitive name ?

Answer 1

case sensitive like as

echo $color
or $COLOR
or $coLoR
this all case sensitive language in php alphabitic is biger and smaller but language is same .

i hope understand that my answer .b ye

Answer 2

change of case are different this is what case sensitive means.

in other words sensitive to change of case.

Answer 3

the output will differ as we gave capital and small letters output effected then it is case sensitive else insentive

Answer 4

captial letter has different meaning and small letter has different meaning, simple..!