Detect Alphabet only string with ctype_alpha
June 5th, 2008 by 
Jon Moffet
There are times when you need a function that can detect strings which contains onlyalphabetic characters. While is_numeric can validate a given string contains numeric character, there are no is_* function variation exist which can do the same for alphabetic strings.
However, you can still test for alphabetic string using ctype_alpha() function. Example usage :
CODE:
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if (ctype_alpha($testcase)) {
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echo "The string $testcase consists of all letters.\n";
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} else {
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echo "The string $testcase does not consist of all letters.\n";
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}
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}
Good luck, and happy coding.
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