Complete list of PHP string processing functions

• addcslashes — Escape characters in a string using backslashes, C-style
• addslashes — Use backslashes to quote strings
• bin2hex — Convert binary data to hexadecimal representation
• chop — alias for rtrim
• chr — Returns the specified character
• chunk_split — Split a string into small chunks
• convert_cyr_string — Convert characters from one Cyrillic character to another
• convert_uudecode — Decode a uuencoded string
• convert_uuencode — Encode a string using uuencode
• count_chars — Returns information about the characters used in a string
• crc32 — Compute the crc32 polynomial of a string
• crypt — One-way string hashing
• echo — Output one or more strings
• explode — Split one string into another
• fprintf — writes a formatted string to a stream
• get_html_translation_table — Returns the translation table using htmlspecialchars and htmlentities
• hebrev — Convert logical-Hebrew to visual-Hebrew
• hebrevc — Convert logical-Hebrew to visual-Hebrew and convert newlines
• hex2bin — Convert hexadecimal string to binary string
• html_entity_decode — Convert all HTML entities to their applicable characters
• htmlentities — Convert all applicable characters to HTML entities
• htmlspecialchars_decode — Convert special HTML entities back to normal characters
• htmlspecialchars — Convert special characters to HTML entities
• implode — Convert the values ​​of a one-dimensional array into a string
• join — alias implode
• lcfirst — Make the first character of a string lowercase
• levenshtein — Calculate the edit distance between two strings
• localeconv — Get numeric formatting information
• ltrim — Remove whitespace characters (or other characters) at the beginning of a string
• md5_file — Calculate the MD5 hash value of the specified file
• md5 — Computes the MD5 hash of a string
• metaphone — Calculate the metaphone key of a string
• money_format — Formats a number as a currency string
• nl_langinfo — Query language and locale information
• nl2br — Insert HTML newlines before all new lines in a string
• number_format — Format a number with thousands separators
• ord — Returns the ASCII code value of a character
• parse_str — Parse a string into multiple variables
• print — output string
• printf — output formatted string
• quoted_printable_decode — Convert a quoted-printable string to an 8 bit string
• quoted_printable_encode — Convert a 8 bit string to a quoted-printable string
• quotemeta — Quote meta characters
• rtrim — remove whitespace characters (or other characters) from the end of a string
• setlocale — Set locale information
• sha1_file — Calculate the sha1 hash of a file
• sha1 — Computes the sha1 hash value of a string
• similar_text — Calculate the similarity of two strings
• soundex — Calculate the soundex key of a string
• sprintf — Return a formatted string
• sscanf — Parse input characters according to the specified format
• str_getcsv — Parse a CSV string into an array
• str_ireplace — Case-ignoring version of str_replace
• str_pad — Pad a string to a specified length with another string
• str_repeat — Repeat a string
• str_replace — Substring replacement
• str_rot13 — Perform ROT13 conversion on a string
• str_shuffle — Randomly shuffle a string
• str_split — Convert string to array
• str_word_count — Returns the usage of words in a string
• strcasecmp — Binary safe comparison of strings (case insensitive)
• strchr — alias strstr
• strcmp — Binary safe string comparison
• strcoll — Locale-based string comparison
• strcspn — Get the length of the starting substring of the non-matching mask
• strip_tags — Strip HTML and PHP tags from strings
• stripcslashes — dequote a string escaped using addcslashes
• stripos — Find the first occurrence of a string (case insensitive)
• stripslashes — dequote a quoted string
• stristr — A case-ignoring version of the strstr function
• strlen — Get the length of a string
• strnatcasecmp — Compare strings using the "natural order" algorithm (case-insensitive)
• strnatcmp — Compare strings using natural ordering algorithm
• strncasecmp — Binary safe comparison of several characters at the beginning of a string (case insensitive)
• strncmp — Binary safe comparison of several characters at the beginning of a string
• strpbrk — Find any character in a set of characters in a string
• strpos — Find the first occurrence of a string
• strrchr — Find the last occurrence of a specified character in a string
• strrev — Reverse a string
• strripos — Calculate the position of the last occurrence of the specified string in the target string (case-insensitive)
• strrpos — Calculate the position of the last occurrence of the specified string in the target string
• strspn — Calculate the length of the first substring in a string where all characters exist in the specified character set.
• strstr — Find the first occurrence of a string
• strtok — token split string
• strtolower — Convert string to lowercase
• strtoupper — Convert a string to uppercase
• strtr — Convert the specified character
• substr_compare — Binary safe comparison of strings (specified length compared from offset position)
• substr_count — Count the number of occurrences of a string
• substr_replace — Replace a substring of a string
• substr — Returns a substring of a string
• trim — remove whitespace characters (or other characters) at the beginning and end of a string
• ucfirst — Convert the first letter of a string to uppercase
• ucwords — Convert the first letter of each word in a string to uppercase
• vfprintf — Write a formatted string to a stream
• vprintf — Output formatted string
• vsprintf — Returns a formatted string
• wordwrap — breaks a string into a specified number of words