| addcslashes() | Add backslashes before some specified characters in a given string. |
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| addslashes() | Returns a string with backslashes in front of predefined characters. |
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| bin2hex() | The conversion is done byte-wise with the high-nibble first. |
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| chop() | Remove white spaces or any other specified characters from the end of a string. |
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| chr() | Convert a ASCII value to a character. |
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| chunk_split() | Split a string into smaller chunks of a specific length. |
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| convert_uudecode() | Decode a uuencoded string encoded using convert_uuencode() function. |
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| convert_uuencode() | Encodes a string using the uuencode algorithm. |
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| count_chars() | Perform several operations related to string like the number of an ASCII character occurs in a string. |
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| crc32() | This function can be used to validate data integrity. |
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| PHP crypt() | Returns a hashed string using DES, Blowfish, or MD5 algorithms. |
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| password_hash() | Returns the hashed string on success or FALSE |
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| echo | Display the output of parameters that are passed to it. |
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| explode() | Explode() function splits a string based on a string delimiter |
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| hex2bin() | Decode a hexadecimally encoded binary string. |
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| implode() | Elements of an array. implode() is an alias for PHP |
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| join() | Join an array of elements that are separated by a string. |
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| lcfirst() | It takes a string as an argument |
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| levenshtein() | Calculate the levenshtein distance between two strings |
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| ltrim() | Removes whitespaces or other characters |
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| md5_file() | Generate the md5 hash value of a given file. |
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| md5() | This function can take up to a maximum of two parameters |
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| metaphone() | Calculate the metaphone key of a given string. |
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| nl2br() | Insert HTML break tags in the place of all new lines in a string. |
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| number_format() | Format a number with grouped thousands. |
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| ord() | Returns the ASCII value of the first character of a string |
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| parse_str() | parse_str() function is a built-in function in PHP which parses a query string into variables. |
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| quoted_printable_decode() | Decode a quoted printable string in PHP into an 8-bit string. |
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| quoted_printable_encode() | Convert an 8-bit string to a quoted printable string. |
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| quotemeta() | Accepts a string as an argument and returns a string |
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| rtrim() | Removes whitespaces or other characters (if specified) from the right side of a string. |
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| sha1_file() | Returns a string on success and returns FALSE otherwise. |
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| sha1() | This function an take up to a maximum of two parameters |
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| similar_text() | Returns the number of matching characters in the two strings. |
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| soundex() | Calculate the Soundex key of a given string. |
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| str_pad() | Pad a string to a given length. |
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| str_repeat() | Create a new string by repeating a given string fixed number of times. |
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| str_replace() | Replace all the occurrences of the search string or array of search strings |
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| str_rot13() | Accepts a string and shifts every alphabet present in the string by 13 places in the alphabet |
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| str_shuffle() | Randomly shuffle all the characters of a string passed to the function as a parameter. |
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| str_split() | Convert the given string into an array. |
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| str_word_count() | String like total number word in the string, positions of the words in the string etc. |
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| strcasecmp() | This is used to compare two given strings. |
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| strchr() | Search for the first occurrence of a given string |
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| strcmp() | It is used to compare two strings |
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| strcoll() | It is used to compare two strings. |
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| strcspn() | Returns the number of characters present in a string |
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| strip_tags() | This is used to strips a string from HTML, and PHP tags. |
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| stripos() | Find the position of the first occurrence of a string in another string. |
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| stripslashes() | Removes backslashes in a string. |
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| stristr() | It searches for the first occurrence of a string inside another string and displays the portion |
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| strlen() | It takes a string as a parameter and returns its length. |
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| strnatcasecmp() | This function is similar to strnatcmp()only difference being the (case-insensitivity). |
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| strnatcmp() | Return a positive integer, negative, or zero. |
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| strncasecmp() | Compare two given strings. It is case-insensitive. |
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| strncmp() | Compare the first n character of two strings. |
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| strpbrk() | Searches a string for any of the specified characters. |
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| strpos() | Find the position of the first occurrence of a string in another string. |
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| strrchr() | This function takes two arguments a string and a character. |
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| strrev() | It is used to reverse a string. |
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| strripos() | Out of the three parameters specified in the syntax, two are mandatory and one is optional |
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| strrpos() | Out of the three parameters specified in the syntax, two are mandatory and one is optional. |
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| strspn() | Finds the length of the initial segment of a string |
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| strstr() | It searches for the first occurrence of a string inside another string and displays the portion |
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| strtok() | Tokenize a string into smaller parts on the basis of given delimiters |
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| strtolower() | Convert a string into lowercase. |
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| strtoupper() | Convert a string into uppercase |
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| strtr() | Replace a substring in a string to a given string of characters. |
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| substr_compare() | Compare two strings from a specified start position upto a specified length. |
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| substr_count() | Count the number of times a substring occurs in a given string. |
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| substr_replace() | Replace a part of a string with another string. |
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| substr() | That is used to extract a part of a string. |
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| trim() | Removes whitespaces and also the predefined characters from both sides. |
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| ucfirst() | Takes a string as an argument and returns the string |
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| ucwords() | Convert the first character of every word in a string to upper-case. |
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| vprintf() | Display array values as a formatted string |
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| vsprintf() | Display array values as a formatted string. |
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| wordwrap() | Wraps a given string to a given number of characters using a string break character. |
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