Live Examples of PHP Functions

addslashes() Add backslashes in front of each character that needs to be quoted in a database query.
base_convert() Converts a number between two bases.
crc32() Generates the cyclic redundancy checksum (CRC) of a given string.
crypt() Calculates the hash of a string using the standard Unix DES-based encryption algorithm.
decbin() Takes an integer (base-10) and converts it to a binary (base-2) number.
dechex() Takes an integer (base-10) and converts it to a hexadecimal (base-16) number.
decoct() Takes an integer (base-10) and converts it to a octal (base-8) number.
dns_get_record() Fetches the DNS resource records associated with the given hostname.
htmlspecialchars() Convert special characters to HTML entities.
lcfirst() Converts the first character of the input string into a lowercase letter.
md5() Calculates the MD5 hash of a string using the RSA Data Security, Inc.
preg_match() Performs regular expression match.
sha1() Calculates the SHA1 hash of a string.
str_word_count() Returns the number of words of a given string.
strlen() Returns the length (number of characters) of a given string.
strip_tags() Strip HTML and PHP tags from a string.
stripslashes() Returns a string with the backslashes (\) removed that were added by the addslashes() function.
strtolower() Returns a string with all the alphabetic characters of the input string converted to lowercase.
strtoupper() Returns a string with all the alphabetic characters of the input string converted to uppercase.
ucfirst() Converts the first character of the input string into an uppercase letter.
ucwords() Returns a string with the first letter of each word in the input string converted to uppercase.
urlencode() Encodes a string to be used in a query part of a URL.
urldecode() Decodes the query part of a URL string.