PHP Text processing strings and String functions

These are functions that handle strings in a variety of ways. There are also special chapters in the regular expressions and URL processing sections.

See string entries for information on how strings work, especially about single quotes, double quotes, and escape sequences.

String Functions Daquan:

addcslashes-using backslashes to escape characters in a string in C language style

addslashes-referencing strings with backslashes

bin2hex-converts binary data to hexadecimal notation

Aliases for Chop-rtrim

chr-returns the specified character

chunk_split-splitting a string into small chunks

Convert_cyr_string-converts a character from one Cyrillic character to another

convert_uudecode-decoding a uuencode encoded string

convert_uuencode-encoding a string with Uuencode

count_chars-returns information about the characters used in the string

crc32-computes a crc32 polynomial of a string

crypt-one-way string hash

echo-output one or more strings

explode-using one string to split another string

Fprintf-writes the formatted string to the stream

get_html_translation_table-returns the conversion table after using Htmlspecialchars and htmlentities

hebrev-Convert Logical Order Hebrew (logical-hebrew) to Visual Order Hebrew (visual-hebrew)

hebrevc-converts logical Order Hebrew (logical-hebrew) to Visual Order Hebrew (visual-hebrew), and converts newline characters

hex2bin-converting a hexadecimal string to a binary string

Html_entity_decode-convert all HTML entities to their applicable characters

Htmlentities-convert all applicable characters to HTML entities

Htmlspecialchars_decode-converting special HTML entities back to normal characters

Htmlspecialchars-convert special characters to HTML entities

Implode-converts the value of a one-dimensional array to a string

join-alias Implode

Lcfirst-makes the first character of a string lowercase

levenshtein-calculating the editing distance between two strings

Localeconv-get Numeric formatting information

ltrim-Delete whitespace characters (or other characters) at the beginning of a string

md5_file-computes the MD5 hash value of the specified file

md5-Calculating the MD5 hash value 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-inserting HTML wrap tags before all new lines in the string

number_format-formatting a number in thousands separators

Ord-the ASCII value of the returned character

parse_str-parsing 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-Delete whitespace characters (or other characters) at the end of a string

Setlocale-set locale Information

sha1_file-calculating the SHA1 hash value of a file

sha1-calculating the SHA1 hash value of a string

similar_text-calculating the similarity of two strings

Soundex-calculate the Soundex key of a string

Sprintf-return a formatted string

sscanf-parsing input characters according to the specified format

str_getcsv-parsing a CSV string as an array

Ignoring case versions of Str_ireplace-str_replace

Str_pad-fills a string with another string for a specified length

str_repeat-repeating a string

str_replace-substring substitution

str_rot13-performing ROT13 conversions on strings

Str_shuffle-randomly disrupts a string

str_split-converting a string to an array

Str_word_count-returns the use of words in a string

strcasecmp-binary Security comparison string (case insensitive)

strchr-alias Strstr

strcmp-Binary Security string comparison

strcoll-locale-based string comparisons

Strcspn-gets the length of the starting substring of the mismatched matte

strip_tags-removing HTML and PHP tags from a string

stripcslashes-dereference A string that is escaped with addcslashes

stripos-find where strings first appear (case insensitive)

stripslashes-dereference A reference string

Ignoring case versions of the STRISTR-STRSTR function

strlen-Get string length

Strnatcasecmp-comparing strings using the natural order algorithm (case insensitive)

Strnatcmp-comparing strings using natural sorting algorithms

strncasecmp-binary security compare several characters at the beginning of a string (case insensitive)

strncmp-binary security compare several characters at the beginning of a string

strpbrk-to find any one character of a set of characters in a string

strpos-find where the string first appears

Strrchr-finds the last occurrence of a specified character in a string

strrev-Inverse string

Strripos-calculates the location of the last occurrence of the specified string in the target string (case insensitive)

Strrpos-calculates the last occurrence of the specified string in the target string

strspn-computes the length of the first string in the specified set of characters, all of which are present in the strings.

strstr-finding the first occurrence of a string

strtok-Tag Split string

strtolower-converting a string to lowercase

strtoupper-converting a string to uppercase

strtr-converting a specified character

substr_compare-binary Security comparison string (specified length from offset position)

substr_count-count occurrences of a string

substr_replace-a substring of a replacement string

substr-returns a substring of a string

trim-remove whitespace characters (or other characters) from the beginning and end of a string

Ucfirst-converts the first letter of a string to uppercase

ucwords-converts the first letter of each word in a string to uppercase

vfprintf-writing a formatted string to a stream

vprintf-Output formatted string

vsprintf-returning a formatted string

wordwrap-break string to a specified number of strings

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