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What's the best way to see if a string contains all capital letters? I still want the function to return true if the string also contains symbols or numbers.
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“check if first letter is uppercase php” Code Answer's$bar = ucfirst(strtolower($bar)); // Hello world!
The strtoupper() function converts a string to uppercase. Note: This function is binary-safe. Related functions: strtolower() - converts a string to lowercase.
PHP | strtolower() FunctionThe strtolower() function is used to convert a string into lowercase. This function takes a string as parameter and converts all the uppercase english alphabets present in the string to lowercase. All other numeric characters or special characters in the string remains unchanged.
PHP – How to check if String contains Number(s)?Iterate over the characters of the string, and for each character, use ctype_digit() function to check if the character is a digit or not. When you found a digit, you can break the loop and confirm that there is a number in the string.
Check whether strtoupper($str) == $str
To handle non-ascii use:
mb_strtoupper($str, 'utf-8') == $str
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ctype_upper(string $testString)
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