Validating Strings as Alphanumeric Using Regex in PHP
To validate alphanumeric characters using regular expressions, use ^[a-zA-Z0-9]+$. This pattern matches strings composed of one or more alphanumeric characters, such as "3DModel".
Retrieve a substring from the end in Java
To extract a substring in Java, use the substring method of the String class. By specifying the start index as the length of the original string minus the length of the substring, you can extract a substring from the end of the string.
Retrieve a substring from the end in Python
To extract a substring in Python, use slicing. By specifying a negative index as the starting index, you can extract a substring from the end of the string.
Retrieve a substring from the end in JavaScript
To extract a substring from the end of a string in JavaScript, you can use a regular expression to get the characters starting from the position which is the length of the string minus the length of the desired substring.
Retrieve a substring from the end in PHP
To extract a substring from the end of a string using PHP's mb_substr function, specify the length of the target string minus the length of the substring as the extraction start position.
