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I am no PHP expert. I am looking for the PHP equivalent of isLetter() in Java, but I can't find it. Does it exist?
I need to extract letters from a given string and make them lower case, for example: "Ap.ér4i5T i6f;" should give "apéritif'. So, yes, there are accentuated characters in my strings.
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PHP | ctype_alpha() (Checks for alphabetic value) A ctype_alpha() function in PHP used to check all characters of a given string are alphabetic or not. If all characters are alphabetic then return True otherwise return False.
ctype_alpha().
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