String functions commonly used in PHP operations, php string functions

String functions commonly used in PHP operations, php string functions
Common PHP string operation functions

String Conversion Functions

Addcslashes function: escape characters in strings using backslash in C Language Style

Addslashes function: uses a backslash to reference a string.

Chop function: clears consecutive spaces in a string.

Get_html_translation_table function: returns the conversion table of the htmlspecialchars () and htmlentities () functions.

Chunk_split function: Splits a string into small parts.

Hebrev function: converts a Hebrew logical character to a visible character.

Hebrevc function: converts Hebrew text to visible text, including line breaks

Html_entity_decode function: convert HTML character encoding to character

Htmlentities function: converts characters to HTML character encoding

Htmlspecialchars_decode function: convert special HTML character encoding to character

Htmlspecialchars function: converts special characters to HTML character encoding.

Nl2br function: converts a line break to "<br>"

Quotemeta function: Add a quote

Rtrim function: clears the white space (or other characters) at the end of the string)

Strip_tags function: Clear HTML and PHP tags

Stripcslashes function: returns the original string processed by the addslashes () function.

Stripslashes function: clears the backslash in the string.

Strtolower function: converts all letters in a string to lowercase letters.

Strtoupper function: converts all letters in a string to uppercase letters.

Trim function: truncates spaces (or other characters) at the beginning and end of a string.

Explode function: Cut string by specified character

Str_pad function: Fill another string with one string to the specified length

Str_split function: converts a string to an array.

Str_shuffle function: Randomly breaks the character order in a string.

Str_ireplace function: replace a substring with another string.

Localeconv function: Get the local numbers and currency Information

Ltrim function: clears consecutive white spaces (or other characters) on the left of the string)

Money_format function: converts a numeric string to a currency representation.

Nl_langinfo function: gets language and region information.

Number_format function: format a numeric string with a thousands Separator

Parse_str function: parses a string into a variable.

Setlocale function: Set region information

Similar_text function: calculates the number of matched strings in two strings.

Str_repeat function: Reuse the specified string

Str_replace function: case-sensitive string replacement

Str_word_count function: returns the number of words in the string.

Strcasecmp function: Compares two strings.

Strlen function: counts the length of a string.

Strnatcmp function: Use natural sequence algorithm to compare strings

Strrev function: reverse string

Strtok function: Cut string

Strtr function: converts certain characters of a string.

Substr_count function: calculates the number of times a string appears in another string.

Substr_replace function: replaces one part of the string with another string.

Substr function: truncates a string.

Ucfirst function: converts the first character in a string to uppercase.

Ucwords function: change the first letter of each word in a string to uppercase.

Wordwrap function: Wrap a string by the number of characters

 

String search functions

Chr function: converts a specified ordinal number to an ASCII character.

Implode function: combines an array into a string.

Join function: converts an array to a string.

Crc32 function: Calculate the crc32 polynomial of a string

Strchr function: returns the substring from its first occurrence position to its end in another string.

Strcspn function: returns the first substring of a string that does not conform to the length of the mask.

Stripos function: searches for the position of the first occurrence of a string in another string (case-insensitive)

Stristr function: returns the substring (case-insensitive) from the first occurrence of a string in another string to the end of the string)

Strripos function: case-insensitive searches for the first occurrence of a character in a string

Strrpos function: searches for the final position of a character in a string.

Strspn function: returns the length of the first child string that matches the mask.

Strstr function: returns the string from start to end of a string.

 

String encoding Functions

Bin2hex function: converts binary to hexadecimal

Convert_cyr_string function: converts a character from one Cyrillic to another.

Convert_uudecode: decodes a string encoded using the uencode algorithm.

Convert_uuencode function: uuencode Algorithm for string Encoding

Count_chars function: returns information about all characters in a string.

Ord function: returns the ASCII code of a character.

Str_rot13 function: rot13 encoding of a string

 

String encryption functions

Crypt function: Uses DES to encrypt strings.

Md5_file function: Calculate the MD5hash of a given file

Md5 function: Performs MD5 encryption on a string.

Sha1_file function: Calculate the sha1hash of a given file

 

Input and Output Functions

Echo function: outputs one or more characters.

Fprintf function: outputs formatted strings to the stream.

Print function: output formatted string

Printf function: outputs a formatted string.

Sprintf: returns a formatted string to a variable.

Sscanf function: parses the input string in a certain format.

Vfprintf function: outputs the formatted string to the stream.

Vprintf function: outputs a formatted string.

Vsprintf function: outputs formatted strings to variables.

 

String comparison functions

Levenshtein function: calculates the Levenshtein distance between two strings.

Metaphone function: calculates the metaphone key of a string.

Soundex function: Calculate the soundex key of a string.

Strcoll function: Compares two strings.

Strcmp function: Compares two strings.

Strnatcasecmp function: Compares strings (Case Insensitive) using natural arithmetic operations)

Strncasecmp function: Compares the first n characters of a string (Case Insensitive)

Strncmp function: Compares the first n characters of two strings.

Strpbrk function: Find a series of characters in a string

 

Strpos function: Find the first position of a character in a string

Strrchr function: finds the position of the last occurrence of a string in another string, and returns the substring from this position in the string to the end of the string.

Substr_compare function: Compares two strings within a certain length from the specified start position (accurate binary, case sensitive)