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Zend PHP certification flashcards
array and string function flashcards
104
Computer Science
Professional
07/20/2013
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Term
addcslashes
 Definition
(string $str, string $charlist)

Returns a string with backslashes before characters that are listed in charlist parameter
Term
string addslashes
 Definition
(string $str)

Returns a string with backslashes before characters that need to be quoted in database queries.
Term
bin2hex
 Definition
(string $str)

Returns an ASCII string containing the hexadecimal representation of str. The conversion is done byte-wise with the high-nibble first.
Term
chop
 Definition
function is an alias of rtrim()
Term
chr
 Definition
(int $ascii)

Returns a one-character string containing the character specified by ascii.
Term
chunk_split
 Definition
(string $body [,int $chunklen = 76[, string $end = "\r\n"]])

Can be used to split a string into smaller chunks which is useful for converting base64_encode() output to match RFC 2045 semantics. It inserts end every chunklen characters
Term
convert_cyr_string
 Definition
(string $str, string $from, string $to)

Converts from one Cyrillic character set to another
Term
convert_uudecode
 Definition
(string $data)

decods a uuencoded string
Term
convert_uuencode
 Definition
(string $data)

encodes a string using the uuencode algorithm.

uuencode translates all strings into printable characters, making them safe for network transmissions.
Term
count_chars
 Definition
(string $string[,int $mode = 0])

Counts the number of occurrences of every byte-value in string and returns it in various ways.
Term
crc32
 Definition
(string $str)

Generates the cyclic redundancy checksum polynomial of 32-bit lengths of str. This is usually used to validate the integrity of data being transmitted.
Term
crypt
 Definition
(string $str[, string $salt])

will return a hashed string using the standard Unix DES-based algorithm or alternative algorithms that may be available on the system.
Term
echo
 Definition
(string $arg1[, string $...])

Outputs all parameters
Term
explode
 Definition
(string $delimeter, string $string[,int $limit])

Returns an array of strings, each of which is a substring of string formed by splitting on boundries formed by the string delimeter
Term
fprintf
 Definition
(resource $handle, string $format[, mixed $args[, mixed $...]])

Write a string produced according to format to the stream resource specified by handle

returns the length of the string written
Term
get_html_translation_table
 Definition
([ int $table = HTML_SPECIALCHARS [, int $flags = ENT_COMPAT | ENT_HTML401 [, string $encoding = 'UTF-8' ]]] )

will return the translation table that is used internally for htmlspecialchars() and htmlentities()
Term
hebrev
 Definition
(string $hebrew_text[, int $max_chars_per_line = 0])

Converts logical hebrew text to visual text. The function tries to avoid breaking words
Term
hebrevc
 Definition
(string $hebrew_text[, int $max_chars_per_line = 0]) similar to hebrev() with the difference that it converts newlines \n to
\n
Term
hex2bin
 Definition
(string $data)

Decodes a hexadecimally encoded binary string

Returns false on failure
Term
html_entity_decode
 Definition
( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 [, string $encoding = 'UTF-8' ]] )

the opposite of htmlentities() in that it converts all HTML entities in the string to their applicable characters
Term
htmlentities
 Definition
( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 [, string $encoding = 'UTF-8' [, bool $double_encode = true ]]] )

function is identical to htmlspecialchars() in all ways, except all characters which have HTML character entity equivalents are translated into these entities
Term
htmlspecialchars_decode
 Definition
( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 ] )

This function is the opposite of htmlspecialchars(). It converts special HTML entities back to characters
Term
htmlspecialchars
 Definition
( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 [, string $encoding = 'UTF-8' [, bool $double_encode = true ]]] )

Convert special characters to HTML entities
Term
implode
 Definition
(string $glue, array $pieces)

join array elements with a glue string
Term
join
 Definition
function is an alias of implode()
Term
lcfirst
 Definition
(string $str)

Make a string's first character lowercase
Term
levenshtein
 Definition
( string $str1 , string $str2 )
( string $str1 , string $str2 , int $cost_ins , int $cost_rep , int $cost_del )

Calculate teh Levenshtein distance between two strings
Term
localeconv
 Definition
(void)

returns an associative array containing localized numeric and monetary formatting information
Term
ltrim
 Definition
(string $str[, string $charlist])

Strip whitespace or other characters from beginning of the string
Term
md5_file
 Definition
( string $filename [, bool $raw_output = false ] )

Caclulates the MD5 hash of the file specified by the filename parameter. The has is a 32 char hex number
Term
join
 Definition
function is an alias of implode()
Term
lcfirst
 Definition
(string $str)

Make a string's first character lowercase
Term
levenshtein
 Definition
( string $str1 , string $str2 )
( string $str1 , string $str2 , int $cost_ins , int $cost_rep , int $cost_del )

Calculate teh Levenshtein distance between two strings
Term
localeconv
 Definition
(void)

returns an associative array containing localized numeric and monetary formatting information
Term
ltrim
 Definition
(string $str[, string $charlist])

Strip whitespace or other characters from beginning of the string
Term
md5_file
 Definition
( string $filename [, bool $raw_output = false ] )

Caclulates the MD5 hash of the file specified by the filename parameter. The has is a 32 char hex number
Term
md5
 Definition
( string $str [, bool $raw_output = false ] )

Calculates teh MD5 has of str using MD5 algorithm
Term
metaphone
 Definition
( string $str [, int $phonemes = 0 ] )

Calculates the metaphone key of a string
Term
money_format
 Definition
( string $format , float $number )

Formats a number as a currency string
Term
nl_langinfo
 Definition
(int $item)

is used to access individual elements of the locale catagories
Term
nl2br
 Definition
( string $string [, bool $is_xhtml = true ] ) Returns string with '
' or '
' inserted before all newlines (\r\n etc)
Term
number_format
 Definition
( float $number [, int $decimals = 0 ] )
( float $number , int $decimals = 0 , string $dec_point = '.' , string $thousands_sep = ',' )

If only one parameter is given, number will be formatted without decimals, but with a comma (",") between every group of thousands.

If two parameters are given, number will be formatted with decimals decimals with a dot (".") in front, and a comma (",") between every group of thousands.

If all four parameters are given, number will be formatted with decimals decimals, dec_point instead of a dot (".") before the decimals and thousands_sep instead of a comma (",") between every group of thousands.
Term
ord
 Definition
(string $string)

Returns the ASCII value of character
Term
parse_str
 Definition
(string $str[, array &$arr])

Parses str as if it were the query string passed via a URL and sets variables in the current scope
Term
print
 Definition
(string $arg)

Output a string
Term
printf
 Definition
( string $format [, mixed $args [, mixed $... ]] )

Outputs a formatted string
Term
quoted_printable_decode
 Definition
(string $str)

Convert a quoted-printable string to an 8 bit string
Term
quoted_printable_encode
 Definition
(string $str)

Convert a 8 bit string to a quoted-printable string
Term
quotemeta
 Definition
(string $str)

Returns a version of str with a backslash character (\) before every character that is among these:

. \ + * ? [ ^ ] ( $ )
Term
rtrim
 Definition
( string $str [, string $charlist ] )

This function returns a string with whitespace stripped from the end of str.
Term
setlocale
 Definition
( int $category , string $locale [, string $... ] )

( int $category , array $locale )

Set locale information
Term
sha1_file
 Definition
( string $filename [, bool $raw_output = false ] )

Calculate the sha1 hash of a file
Term
sha1
 Definition
( string $str [, bool $raw_output = false ] )

Calculates the sha1 hash of str using the ยป US Secure Hash Algorithm 1
Term
similar_text
 Definition
( string $first , string $second [, float &$percent ] )

Calculate the similarity between two strings
Term
soundex
 Definition
(string $str)

Calculate the soundex key of a string
Term
sprintf
 Definition
( string $format [, mixed $args [, mixed $... ]] )

Returns a string produced according to the formatting string format.
Term
sscanf
 Definition
( string $str , string $format [, mixed &$... ] )

Parses input from a string according to a format
Term
str_getcsv
 Definition
( string $input [, string $delimiter = ',' [, string $enclosure = '"' [, string $escape = '\\' ]]] )

Parses a string input for fields in CSV format and returns an array containing the fields read.
Term
str_ireplace
 Definition
( mixed $search , mixed $replace , mixed $subject [, int &$count ] )

Case-insensitive version of str_replace().
Term
str_pad
 Definition
( string $input , int $pad_length [, string $pad_string = " " [, int $pad_type = STR_PAD_RIGHT ]] )

Pad a string to a certain length with another string
Term
str_repeat
 Definition
( string $input , int $multiplier )

Repeat a string multiplier times
Term
str_replace
 Definition
( mixed $search , mixed $replace , mixed $subject [, int &$count ] )

Replace all occurrences of the search string with the replacement string
Term
str_rot13
 Definition
( string $str )

Perform the rot13 transform on a string. Shifts every letter by 13 places.
Term
str_split
 Definition
( string $string [, int $split_length = 1 ] )

Converts a string to an array of chars
Term
str_shuffle
 Definition
(string $str)

Randomly shuffles a string
Term
str_word_count
 Definition
( string $string [, int $format = 0 [, string $charlist ]] )

Return information about words used in a string
Term
strcasecmp
 Definition
( string $str1 , string $str2 )

Binary safe case-insensitive string comparison
Term
strchr
 Definition
Alias of strstr()
Term
strcmp
 Definition
( string $str1 , string $str2 )

Binary safe case sensitive string comparison
Term
strcoll
 Definition
( string $str1 , string $str2 )

Locale based string comparison
Term
strcspn
 Definition
( string $str1 , string $str2 [, int $start [, int $length ]] )

Returns the length of the initial segment of str1 which does not contain any of the characters in str2.
Term
strip_tags
 Definition
( string $str [, string $allowable_tags ] )

This function tries to return a string with all NUL bytes, HTML and PHP tags stripped from a given str. It uses the same tag stripping state machine as the fgetss() function.
Term
stripcslashes
 Definition
( string $str )

Returns a string with backslashes stripped off. Recognizes C-like \n, \r ..., octal and hexadecimal representation.
Term
stripos
 Definition
( string $haystack , string $needle [, int $offset = 0 ] )

Find the numeric position of the first occurrence of needle in the haystack string. case insensitive
Term
stripslashes
 Definition
( string $str )

Un-quotes a quoted string.
Term
stristr
 Definition
( string $haystack , mixed $needle [, bool $before_needle = false ] )

Returns all of haystack starting from and including the first occurrence of needle to the end.
Term
strlen
 Definition
(string $str)

Returns the length of the given string.
Term
strnatcasecmp
 Definition
( string $str1 , string $str2 )

Case insensitive string comparisons using a "natural order" algorithm
Term
strnatcmp
 Definition
( string $str1 , string $str2 )

String comparisons using a "natural order" algorithm
Term
strncasecmp
 Definition
( string $str1 , string $str2 , int $len )

This function is similar to strcasecmp(), with the difference that you can specify the (upper limit of the) number of characters from each string to be used in the comparison.
Term
strncmp
 Definition
( string $str1 , string $str2 , int $len )

This function is similar to strcmp(), with the difference that you can specify the (upper limit of the) number of characters from each string to be used in the comparison.

Note that this comparison is case sensitive.
Term
strpbrk
 Definition
( string $haystack , string $char_list )

searches the haystack string for a char_list.
Term
strpos
 Definition
( string $haystack , mixed $needle [, int $offset = 0 ] )

Find the position of the first occurrence of a substring in a string
Term
strrchr
 Definition
( string $haystack , mixed $needle )

Find the last occurrence of a character in a string
Term
strrev
 Definition
( string $string )

Reverse a string
Term
strripos
 Definition
( string $haystack , string $needle [, int $offset = 0 ] )

Find the numeric position of the last occurrence of needle in the haystack string.

Unlike the strrpos(), strripos() is case-insensitive.
Term
strrpos
 Definition
( string $haystack , string $needle [, int $offset = 0 ] )

Find the numeric position of the last occurrence of needle in the haystack string.
Term
strspn
 Definition
( string $subject , string $mask [, int $start [, int $length ]] )

Finds the length of the initial segment of a string consisting entirely of characters contained within a given mask.
Term
strstr
 Definition
( string $haystack , mixed $needle [, bool $before_needle = false ] )

Find the first occurrence of a string
Term
strtok
 Definition
( string $str , string $token )
( string $token )

splits a string (str) into smaller strings (tokens), with each token being delimited by any character from token. That is, if you have a string like "This is an example string" you could tokenize this string into its individual words by using the space character as the token.
Term
strtolower
 Definition
( string $str )

Returns string with all alphabetic characters converted to lowercase.
Term
strtoupper
 Definition
( string $string )

Returns string with all alphabetic characters converted to uppercase.
Term
strtr
 Definition
( string $str , string $from , string $to )

( string $str , array $replace_pairs )

Translate characters or replace substrings
Term
substr_compare
 Definition
( string $main_str , string $str , int $offset [, int $length [, bool $case_insensitivity = false ]] )

Binary safe comparison of two strings from an offset, up to length characters
Term
substr_count
 Definition
( string $haystack , string $needle [, int $offset = 0 [, int $length ]] )

Count the number of substring occurrences
Term
substr_replace
 Definition
( mixed $string , mixed $replacement , mixed $start [, mixed $length ] )

Replace text within a portion of a string
Term
substr
 Definition
( string $string , int $start [, int $length ] )

Return part of a string
Term
trim
 Definition
( string $str [, string $charlist = " \t\n\r\0\x0B" ] )

Strip whitespace (or other characters) from the beginning and end of a string
Term
ucfirst
 Definition
( string $str )

Make a string's first character uppercase
Term
ucwords
 Definition
( string $str )

Uppercase the first character of each word in a string
Term
vfprintf
 Definition
( resource $handle , string $format , array $args )

Write a formatted string to a stream
Term
vprintf
 Definition
( string $format , array $args )

Output a formatted string
Term
vsprintf
 Definition
( string $format , array $args )

Return a formatted string
Term
wordwrap
 Definition
( string $str [, int $width = 75 [, string $break = "\n" [, bool $cut = false ]]] )

Wraps a string to a given number of characters
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