The crypt() function returns a hashed string using DES, Blowfish, or MD5 algorithms. This function behaves different on different operating systems. PHP checks what algorithms are available and what algorithms to use when it is installed. Syntax crypt(str,salt)

The crc32() function generates a 32-bit cyclic redundancy code (CRC) for a string. The function is generally used to validate the integrity of data being transmitted. Example <?php $str = crc32(“Hello World!”); printf(“%u\n”,$str); ?> Output 472456355

The count_chars() is an inbuilt function in PHP and is used to perform several operations related to string like the number of an ASCII character occurs in a string. Example <?php $str = “Hello World!”; echo count_chars($str,3); ?> Output !HWdelor

The convert_uuencode() function encodes a string using the uuencode algorithm. Note: Uuencoded data is about 35% larger than the original. Example <?php $str = “Hello world!”; echo convert_uuencode($str); ?> Output ,2&5L;&\@=V]R;&0A `

The convert_cyr_string() function converts a string from one Cyrillic character-set to another. The supported Cyrillic character-sets are: k – koi8-r w – windows-1251 i – iso8859-5 a – x-cp866 d – x-cp866 m – x-mac-cyrillic Example <?php $str = “Hello…

The chunk_split() function splits a string into a series of smaller parts. Note: This function does not alter the original string. Example <?php $str = “Hello world!”; echo chunk_split($str,1,”.”); ?> Output H.e.l.l.o. .w.o.r.l.d.!.

The chr() function is used to get a single character string from the specified ASCII value. Return values: A one-character string containing the character specified by ascii _code Example <?php echo chr(52) . “<br>”; // Decimal value echo chr(052) .…

The chop() function is used to remove the whitespaces and other predefined characters from the right side of a string. This function is an alias of rtrim() function. Example <?php $str = “Hello World!”; echo $str . “<br>”; echo chop($str,”World!”);…

The bin2hex() function converts a string of ASCII characters to hexadecimal values. The string can be converted back using the pack() function. Example $str = bin2hex(“Hello World!”); echo($str); Output 48656c6c6f20576f726c6421

The addslashes() function is used to add backslashes in front of the characters that need to be quoted. The predefined characters are single quote (‘), double quote(“), backslash(\) and NULL (the NULL byte). Example <?php $str = addslashes(‘What does “hello”…