Table B-1. The PHP Array Functions
Function | Does This |
|---|
array array_change_key_case (array input [, int case]) | Changes case of an array's string keys |
array array_chunk(array input, int size [, bool preserve_keys]) | Divides an array into chunks |
array array_combine(array keys, array values) | Makes an array |
array array_count_values (array input) | Counts the values of an array |
array array_diff_assoc(array array1,array array2 [, array ...]) | Returns the difference of two associative arrays |
array array_diff_assoc(array array1, array array2 [, array ..., callback key_compare_func]) | Returns the difference of arrays with additional index check, performed by a callback function |
array array_diff(array array1, array array2 [, array ...]) | Returns the difference of two arrays |
array array_fill(int start_index, int num, mixed value) | Fills an array with values |
array array_filter(array input callback callback]) | Filters elements of an array using a callback function |
array array_flip(array trans) | Exchanges keys with their values in an array |
array array_intersect_assoc(array array1, array array2 [, array ...]) | Returns the intersection of arrays with additional index check |
array array_intersect(array array1, array array2 [, array ...]) | Returns the simple intersection of arrays |
bool array_key_exists(mixed key, array search) | Checks if the specified key or index exists in the array |
array array_keys(array input [, mixed search_value]) | Return the keys of an array |
array array_map(mixed callback, array arr1 [, array ...]) | Applies the callback function to the elements of the arrays |
array array_merge_recursive(array array1, array array2 [, array ...]) | Merges two or more arrays recursively |
array array_merge(array array1, array array2 [, array ...]) | Merges two or more arrays simply |
bool array_multisort(array ar1 [, mixed arg [, mixed ... [, array ...]]]) | Sorts multi-dimensional arrays |
array array_pad(array input, int pad_size, mixed pad_value) | Pads array to the given length with a value |
mixed array_pop(array array) | Pops an element from the end of an array |
int array_push(array array, mixed var [, mixed ...]) | Pushes elements onto the end of array |
mixed array_rand(array input [, int num_req]) | Picks random entries out of an array |
mixed array_reduce(array input, callback function [, int initial]) | Iteratively reduces the array to a single value using a callback function |
array array_reverse(array array [, bool preserve_keys]) | Returns array with elements in reverse order |
mixed array_search(mixed needle, array haystack [, bool strict]) | Searches the array for a specified value; returns the key if successful |
mixed array_shift(array array) | Shifts an element off the beginning of array |
array array_slice(array array, int offset [, int length]) | Extracts a slice of an array |
array array_splice(array input, int offset [, int length [, array replacement]]) | Removes a part of the array and replaces it |
mixed array_sum(array array) | Returns the sum of values in an array |
array array_udiff_assoc(array array1, array array2 [, array ...,callback data_compare_func]) | Returns the difference of arrays with additional index check; uses a callback function |
array array_udiff_uassoc(array array1, array array2 [, array ..., callback data_compare_func, callback key_compare_func]) | Returns the difference of arrays with additional index check |
array array_udiff(array array1, array array2 [, array ..., callback data_compare_func]) | Returns the difference of arrays, using a callback function for comparison |
array array_unique(array array) | Removes duplicate values from an array |
int array_unshift(array array, mixed var [, mixed ...]) | Prepends elements to the beginning of an array |
array array_values(array input) | Returns the values of an array |
bool array_walk(array array, callback function [, mixed userdata]) | Calls a function on every member of an array |
array array([mixed ...]) | Makes an array |
bool arsort(array array [, int sort_flags]) | Sorts an array in reverse order while maintaining index association |
bool asort(array array [, int sort_flags]) | Sorts an array while maintaining index association |
array compact(mixed varname [, mixed ...]) | Compacts an array |
int count(mixed var [, int mode]) | Counts elements in a variable |
mixed current(array array) | Returns the current element in an array |
array each(array array) | Returns the current key and value pair from an array |
mixed end(array array) | Move the internal pointer of an array to the last element |
int extract(array var_array [, int extract_type [, string prefix]]) | Imports variables into the symbol table from an array |
bool in_array(mixed needle, array haystack [, bool strict]) | Checks if a value exists in an array |
mixed key(array array) | Gets a key from an associative array |
bool krsort(array array [, int sort_flags]) | Sorts an array by key in reverse order |
bool ksort(array array [, int sort_flags]) | Sorts an array by key |
void list(mixed ...) | Assigns variables as if they were an array |
void natcasesort(array array) | Sorts an array using a case-insensitive "natural sort" |
void natsort(array array) | Sorts an array using a "natural sort" algorithm |
mixed next(array array) | Advances the internal array pointer of an array |
mixed pos(array array) | Same as current() |
mixed prev(array array) | Moves the internal array pointer back one element |
array range(int low, int high [, int step]) | Makes an array containing a range of elements |
mixed reset(array array) | Sets the internal pointer of an array to the first element |
bool rsort(array array [, int sort_flags]) | Sorts an array in reverse order |
void shuffle(array array) | Shuffles an array |
int sizeof(mixed var [, int mode]) | Same as count() |
bool sort(array array [, int sort_flags]) | Sorts an array |
bool uasort(array array, callback cmp_function) | Sorts an array with a user-defined comparison function while maintaining index association |
bool uksort(array array, callback cmp_function) | Sorts an array by keys using a comparison function |
bool usort(array array, callback cmp_function) | Sorts an array by values using a comparison function |
Table B-2. The PHP File Functions
Function | Does This |
|---|
string basename(string path [, string suffix]) | Returns the filename part of a path |
bool chgrp(string filename, mixed group) | Changes a file's group |
bool chown(string filename, mixed user) | Changes a file's owner |
void clearstatcache(void) | Clears a file's file status cache |
bool copy(string source, string dest) | Copies a file |
void delete(string file) | Deletes a file |
string dirname(string path) | Returns the directory name part of a path |
float disk_free_space(string directory) | Returns available space in directory |
float disk_total_space(string directory) | Returns the total size of a directory |
float diskfreespace(string directory) | Same as disk_free_space() |
bool fclose(resource handle) | Closes an open file |
bool feof(resource handle) | Tests for end-of-file on a file |
bool fflush(resource handle) | Flushes the output to a file |
string fgetc(resource handle) | Gets a character from file |
array fgetcsv(resource handle, int length [, string delimiter [, string enclosure]]) | Gets a line from file and parses for CSV fields |
string fgets(resource handle [, int length]) | Gets a line from a file |
string fgetss(resource handle, int length [, string allowable_tags]) | Gets a line from file and strips HTML tags |
bool file_exists(string filename) | Checks whether a file or directory exists |
string file_get_contents(string filename [, bool use_include_path [, resource context]]) | Reads entire file into a string |
int file_put_contents(string filename, string data [, int flags [, resource context]]) | Writes a string to a file |
array file(string filename [, int use_include_path [, resource context]]) | Reads an entire file into an array |
int fileatime(string filename) | Gets the last access time of a file |
int filectime(string filename) | Gets the change time of a file |
int filegroup(string filename) | Gets a file group |
int fileinode(string filename) | Gets a file inode |
int filemtime(string filename) | Gets a file's modification time |
int fileowner(string filename) | Gets a file's owner |
int fileperms(string filename) | Gets a file's permissions |
int filesize(string filename) | Gets a file size |
string filetype(string filename) | Gets a file type |
bool flock(resource handle, int operation [, int &wouldblock]) | Sets advisory file locking |
array fnmatch(string pattern, string string [, int flags]) | Matches a filename against a pattern |
resource fopen(string filename, string mode [, int use_include_path [, resource zcontext]]) | Opens a file or URL |
int fpassthru(resource handle) | Outputs all remaining data on a file |
int fputs(resource handle, string string [, int length]) | Same as fwrite() |
string fread(resource handle, int length) | Binary-safe file read |
mixed fscanf(resource handle, string format [, string var1]) | Parses input from a file according to a format |
int fseek(resource handle, int offset [, int whence]) | Seeks in a file |
array fstat(resource handle) | Gets information about a file |
int ftell(resource handle) | Returns the file read/write position |
bool ftruncate(resource handle, int size) | Truncates a file to a specified length |
int fwrite(resource handle, string string [, int length]) | Binary-safe file write |
array glob(string pattern [, int flags]) | Return pathnames matching a pattern |
bool is_dir(string filename) | Returns whether the filename is a directory |
bool is_executable(string filename) | Returns whether the filename is executable |
bool is_file(string filename) | Returns whether the filename is a regular file |
bool is_link(string filename) | Returns whether the filename is a symbolic link |
bool is_readable(string filename) | Returns whether the filename is readable |
bool is_uploaded_file(string filename) | Returns whether the file was uploaded using HTTP POST |
bool is_writable(string filename) | Returns whether the filename is writable |
bool is_writeable(string filename) | Same as is_writable() |
bool link(string target, string link) | Makes a hard link |
int linkinfo(string path) | Returns information about a link |
array lstat(string filename) | Returns information about a file or symbolic link |
bool mkdir(string pathname [, int mode [, bool recursive [, resource context]]]) | Makes a directory |
bool move_uploaded_file(string filename, string destination) | Moves an uploaded file to a new location |
array parse_ini_file(string filename [, bool process_sections]) | Parses a configuration file |
array pathinfo(string path) | Returns information about a file path |
int pclose(resource handle) | Closes a process file |
resource popen(string command, string mode) | Opens a process file |
int readfile(string filename [, bool use_include_path [, resource context]]) | Outputs a file |
string readlink(string path) | Returns the target of a symbolic link |
string realpath(string path) | Returns an absolute pathname |
bool rename(string oldname, string newname [, resource context]) | Renames a file or directory |
bool rewind(resource handle) | Rewinds the position of a file |
bool rmdir(string dirname [, resource context]) | Deletes a directory |
int set_file_buffer(resource stream, int buffer) | Same as stream_set_write_buffer() |
array stat(string filename) | Returns information about a file |
bool symlink(string target, string link) | Makes a symbolic link |
string tempnam(string dir, string prefix) | Makes a file with a unique file name |
resource tmpfile(void) | Makes a temporary file |
bool touch(string filename [, int time [, int atime]]) | Sets access and modification time of file |
int umask([int mask]) | Changes the current umask |
bool unlink(string filename [, resource context]) | Deletes a file |
Table B-3. The PHP String Functions
Function | Does This |
|---|
string addcslashes(string str, string charlist) | Quotes a string with slashes using the C style |
string addslashes(string str) | Quotes a string using slashes |
string bin2hex(string str) | Converts binary data into hexadecimal |
string chop(string str [, string charlist]) | Same as rtrim() |
string chr(int ascii) | Returns a specific character |
string chunk_split(string body [, int chunklen [, string end]]) | Divides a string into smaller chunks |
string convert_cyr_string(string str, string from,string to) | Converts from one Cyrillic character set to another |
mixed count_chars(string string [, int mode]) | Returns information about characters used in a string |
int crc32(string str) | Returns the crc32 polynomial of a string |
string crypt(string str [, string salt]) | Creates one-way string encryption |
void echo(string arg1 [, string argn...]) | Outputs one or more strings |
array explode(string separator, string string [, int limit]) | Divides a string using a string |
int fprintf(resource handle, string format [, mixed args]) | Writes a formatted string to a stream |
array get_html_translation_table(int table [, int quote_style]) | Returns the translation table that is used by htmlspecialchars() and htmlentities() |
string hebrev(string hebrew_text [, int max_chars_per_line]) | Converts logical Hebrew text to visual text |
string hebrevc(string hebrew_text [, int max_chars_per_line]) | Converts logical Hebrew text to visual text including newline conversion |
string html_entity_decode(string string [, int quote_style [, string charset]]) | Converts all HTML entities to theirapplicable characters |
string htmlentities(string string [, int quote_style [, string charset]]) | Converts all applicable characters to HTML entities |
string htmlspecialchars(string string [, int quote_style [, string charset]]) | Converts special characters to HTML entities |
string implode(string glue, array pieces) | Joins array elements using a string |
string join(string glue, array pieces) | Same as implode() |
int levenshtein(string str1, string str2) | Returns the Levenshtein distance between two strings |
array localeconv(void) | Gets numeric formatting data |
string ltrim(string str [, string charlist]) | Strips whitespace from the beginning of a string |
string md5_file(string filename [, bool raw_output]) | Returns the md5 hash of a specified filename |
string md5(string str [, bool raw_output]) | Returns the md5 hash of a string |
string metaphone(string str) | Returns the metaphone key of a string |
string money_format(string format, float number) | Formats a number as a currency string |
string nl_langinfo(int item) | Queries language and locale information |
string nl2br(string string) | Inserts HTML line breaks before all newlines in a string |
string number_format(float number [, int decimals]) | Formats a number with grouped thousands |
int ord(string string) | Returns ASCII value of character |
void parse_str(string str [, array arr]) | Parses the string into variables |
int print(string arg) | Outputs a string |
void printf(string format [, mixed args]) | Outputs a formatted string |
string quoted_printable_decode(string str) | Converts a quoted-printable string to an 8-bit string |
string quotemeta(string str) | Quotes meta characters |
string rtrim(string str [, string charlist]) | Strips whitespace from the end of a string |
string setlocale(mixed category, string locale [, string ...]) | Sets locale information |
string sha1_file(string filename [, bool raw_output]) | Returns the sha1 hash of a file |
string sha1(string str [, bool raw_output]) | Returns the sha1 hash of a string |
int similar_text(string first, string second [, float percent]) | Returns the similarity between two strings |
string soundex(string str) | Returns the soundex key of a string |
string sprintf(string format [, mixed args]) | Returns a formatted string |
mixed sscanf(string str, string format [, string var1]) | Parses input from a string according to a format |
mixed str_ireplace(mixed search, mixed replace, mixed subject [, int &count]) | Case-insensitive version of str_replace() |
string str_pad(string input, int pad_length [, string pad_string [, int pad_type]]) | Pads a string to a certain length with another string |
string str_repeat(string input, int multiplier) | Repeats a string |
mixed str_replace(mixed search, mixed replace, mixed subject [, int &count]) | Replaces all occurrences of the search string with the replacement string |
string str_rot13(string str) | Performs the rot13 transform on a string |
string str_shuffle(string str) | Randomly shuffles a string |
array str_split(string string [, int split_length]) | Converts a string to an array |
mixed str_word_count(string string [, int format]) | Returns information about words used in a string |
int strcasecmp(string str1, string str2) | Binary safe case-insensitive string comparison |
string strchr(string haystack, string needle) | Same as strstr() |
int strcmp(string str1, string str2) | Compares strings in a binary-safe way |
int strcoll(string str1, string str2) | Compares strings in a locale-based way |
int strcspn(string str1, string str2) | Returns length of initial segment not matching mask |
string strip_tags(string str [, string allowable_tags]) | Strips HTML and PHP tags |
string stripcslashes(string str) | Un-quotes string quoted with addcslashes() |
int stripos(string haystack, string needle [, int offset]) | Returns position of first occurrence of a case-insensitive string |
string stripslashes(string str) | Un-quotes string quoted with addslashes() |
string stristr(string haystack, string needle) | Case-insensitive strstr() |
int strlen(string str) | Gets string length |
int strnatcasecmp(string str1, string str2) | Case insensitive string comparisons using a "natural sort" algorithm |
int strnatcmp(string str1, string str2) | String comparisons using a "natural sort" algorithm |
int strncasecmp(string str1, string str2, int len) | Binary-safe case-insensitive string comparison of a given number of characters |
int strncmp(string str1, string str2, int len) | Binary-safe string comparison of a given number of characters |
int strpos(string haystack, string needle [, int offset]) | Returns the position of first occurrence of a string |
string strrchr(string haystack, char needle) | Returns the last occurrence of a character in a string |
string strrev(string string) | Reverses a string |
int strripos(string haystack, string needle [, int offset]) | Returns position of last occurrence ofa case-insensitive string in a string |
int strrpos(string haystack, string needle [, int offset]) | Returns position of last occurrence ofa char in a string |
int strspn(string str1, string str2) | Returns length of initial segment matching mask |
string strstr(string haystack, string needle) | Returns first occurrence of a string |
string strtok(string arg1, string arg2) | Tokenizes a string |
string strtolower(string str) | Makes a string lowercase |
string strtoupper(string string) | Makes a string uppercase |
string strtr(string str, string from, string to) | Translates characters |
int substr_compare(string main_str, string str, int offset [, int length [, bool case_sensitivity]]) | Binary-safe comparison of two strings from an offset, up to length characters |
int substr_count(string haystack, string needle) | Counts the number of substring occurrences |
string substr_replace(string string, string replacement, int start [, int length]) | Replaces text in a part of a string |
string substr(string string, int start [, int length]) | Returns part of a string |
string trim(string str [, string charlist]) | Strips whitespace from both the beginning and end of a string |
string ucfirst(string str) | Uppercases a string's first character |
string ucwords(string str) | Uppercases the first character of each word in a string |
void vprintf(string format, array args) | Outputs a formatted string |
string vsprintf(string format, array args) | Creates and returns a formatted string |
string wordwrap(string str [, int width [, string break [, boolean cut]]]) | Wraps a string to a specified number of characters |
