Validating Strings as Alphanumeric Symbols Using Regex in PHPNew!!
To check if a string contains only alphanumeric symbols using regular expressions, use ^[ -~]+$ . This pattern matches strings composed of one or more alphanumeric symbols, such as "Hello, world!".
Checking if a String in PHP is Composed of Single-Byte CharactersNew!!
To check if a string in PHP is composed of only single-byte characters, specify the string encoding and ensure that the character count (number of characters) matches the byte count.
Check if a string is a valid datetime in PHPNew!!
Here is a function in PHP to check whether a string is a valid datetime. Specify both the datetime string and the datetime format, then execute the function.
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 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.
