Validating Strings as Half width Katakana Using Regex in PHP
To check if a string consists of half-width Katakana characters using regular expressions, use the pattern ^[ｦ-ﾟ]+$ This regex means "a string composed of one or more half-width Katakana characters."
Validating Strings as Numeric Using Regex in PHP
To check if a string consists of half-width digits using regular expressions, use the pattern ^[0-9]+$ This regex means "a string composed of one or more digits from 0 to 9." It matches strings like "001," "9," and "12345."
Validating Strings as Hiragana Using Regex in PHP
Learn how to check if a string contains only 'hiragana' using PHP regular expressions! Includes basic patterns, Unicode property escapes, and detailed PHP examples.
Validating Strings as Alphanumeric Symbols Using Regex in PHP
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 Characters
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 PHP
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.
