PHP Strings functions are part of the language. No installation is required to use these functions. In this reference, you will find all the useful string functions in PHP.
| Function | Description |
|---|---|
| addcslashes() | Get a string with backslashes in front of the characters |
| addslashes() | Get a string with backslashes in front of predefined characters |
| bin2hex() | Convert string of ASCII characters to hexadecimal values |
| chop() | Remove whitespace or other characters from the right end of the string |
| chr() | Returns a character from a specified ASCII value |
| chunk_split() | Split a string into a series of smaller parts |
| convert_cyr_string() | Convert string from one Cyrillic character-set to another |
| convert_uudecode() | Decode a uuencoded string |
| convert_uuencode() | Encode string using the uuencode algorithm |
| count_chars() | Returns information about characters used in a string |
| crc32() | Calculate a 32-bit CRC for string |
| crypt() | One-way string hashing |
| echo() | Output one or more strings |
| explode() | Break string into an array |
| fprintf() | Write a formatted string to a specified output stream |
| get_html_translation_table() | Returns the translation table used by htmlspecialchars() and htmlentities() |
| hebrev() | Convert Hebrew text to visual text |
| hebrevc() | Convert Hebrew text to visual text and new lines (\n) into <br> |
| hex2bin() | Convert string of hexadecimal values to ASCII characters |
| html_entity_decode() | Convert HTML entities to characters |
| htmlentities() | Convert characters to HTML entities |
| htmlspecialchars_decode() | Convert some predefined HTML entities to characters |
| htmlspecialchars() | Convert some predefined characters to HTML entities |
| implode() | Returns a string from the elements of an array |
| join() | Alias of implode() |
| lcfirst() | Convert the first character of the string to lowercase |
| levenshtein() | Returns the Levenshtein distance between two strings |
| localeconv() | Returns locale numeric and monetary formatting information |
| ltrim() | Remove whitespace or other characters from the left side of the string |
| md5() | Calculate the MD5 hash of a string |
| md5_file() | Calculate the MD5 hash of a file |
| metaphone() | Calculate the Metaphone key of the string |
| money_format() | Returns a string formatted as a currency string |
| nl_langinfo() | Returns specific local information |
| nl2br() | Insert HTML line breaks in front of each new line in the string |
| number_format() | Format a number with grouped thousands |
| ord() | Get the ASCII value of the first character of the string |
| parse_str() | Parse a query string into variables |
| print() | Output one or more strings |
| printf() | Output a formatted string |
| quoted_printable_decode() | Convert a quoted-printable string to an 8-bit string |
| quoted_printable_encode() | Convert an 8-bit string to a quoted-printable string |
| quotemeta() | Quote meta characters |
| rtrim() | Remove whitespace or other characters from the right side of the string |
| setlocale() | Set locale information |
| sha1() | Calculate the SHA-1 hash of a string |
| sha1_file() | Calculate the SHA-1 hash of a file |
| similar_text() | Calculate the similarity between two strings |
| soundex() | Calculate the Soundex key of the string |
| sprintf() | Write a formatted string to a variable |
| sscanf() | Parse input from a string according to a format |
| str_getcsv() | Parse a CSV string into an array |
| str_ireplace() | Replace some characters in string (case-insensitive) |
| str_pad() | Pad string to a new length |
| str_repeat() | Repeat string a specified number of times |
| str_replace() | Replace some characters in string (case-sensitive) |
| str_rot13() | Perform the ROT13 encoding on string |
| str_shuffle() | Randomly shuffles all characters in a string |
| str_split() | Split string into an array |
| str_word_count() | Count the number of words in a string |
| strcasecmp() | Compare two strings (case-insensitive) |
| strchr() | Finds the first occurrence of a string inside another string (alias of strstr()) |
| strcmp() | Compare two strings (case-sensitive) |
| strcoll() | Compare two strings (locale-based string comparison) |
| strcspn() | Get the number of characters found in the string before any part of some specified characters is found |
| strip_tags() | Strip HTML and PHP tags from a string |
| stripcslashes() | Unquoted string quoted with addcslashes() |
| stripslashes() | Unquoted string quoted with addslashes() |
| stripos() | Get the position of the first occurrence of a string inside another string (case-insensitive) |
| stristr() | Finds the first occurrence of a string inside another string (case-insensitive) |
| strlen() | Get the length of the string |
| strnatcasecmp() | Compare two strings using a “natural order” algorithm (case-insensitive) |
| strnatcmp() | Compare two strings using a “natural order” algorithm (case-sensitive) |
| strncasecmp() | String comparison of the first n characters (case-insensitive) |
| strncmp() | String comparison of the first n characters (case-sensitive) |
| strpbrk() | Searche string for any of a set of characters |
| strpos() | Get the position of the first occurrence of a string inside another string (case-sensitive) |
| strrchr() | Find the last occurrence of a string inside another string |
| strrev() | Reverses a string |
| strripos() | Finds the position of the last occurrence of a string inside another string (case-insensitive) |
| strrpos() | Finds the position of the last occurrence of a string inside another string (case-sensitive) |
| strspn() | Get the number of characters found in the string that contains only characters from a specified charlist |
| strstr() | Find the first occurrence of a string inside another string (case-sensitive) |
| strtok() | Split a string into smaller strings |
| strtolower() | Convert string to lowercase letters |
| strtoupper() | Convert string to uppercase letters |
| strtr() | Translate certain characters in the string |
| substr() | Get a part of the string |
| substr_compare() | Compare two strings from a specified start position (binary safe and optionally case-sensitive) |
| substr_count() | Count the number of times a substring occurs in the string |
| substr_replace() | Replace a part of the string with another string |
| trim() | Remove whitespace or other characters from both sides of the string |
| ucfirst() | Convert the first character of the string to uppercase |
| ucwords() | Convert the first character of each word in a string to uppercase |
| vfprintf() | Write formatted string to a specified output stream |
| vprintf() | Output formatted string |
| vsprintf() | Write formatted string to a variable |
| wordwrap() | Wrap string to a given number of characters |
