The function will return 1 (true) if the string contains only letters, and 0 (false) otherwise. The ^ character means “start of line”, the $ character means “end of line”, means any letter between A and Z or between a and z, and + means “one or more occurrences”. If the string contains any character other than a letter, the function will return false. The regular expression "/^+$/" checks for one or more occurrences of any letter (uppercase or lowercase) from the beginning to the end of the string. This function performs a regular expression match. In the body of the function, the PHP preg_match() function is used. The function is_string_alphabet_only($str) checks whether the given string $str consists of only alphabetic characters. The following is a PHP code snippet that checks if a given string contains only letters: function is_string_alphabet_only ($str) $testStr = 'OnlyLettersHere' echo ( is_string_alphabet_only ($testStr) ? 'String contains only letters' : 'String contains other characters' ) Code Explanation: Checking If A String Contains Only Letters In PHP Code snippet: Checking If A String Contains Only Letters In PHP In this article, we will explore how you can verify if a given string consists of only letters using a few lines of PHP code. This can be easily achieved by using certain built-in functions in PHP. Home Code-Snippet Series About Check If A String Contains Only Letters In PHPĬode snippet for how to Check If A String Contains Only Letters In PHP with sample and detail explanationĬhecking if a string in PHP contains only letters is a common requirement in web development. Check If A String Contains Only Letters In PHP - Code Snippets with explanation
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