StringUtility

Class with helper functions for string handling

Table of Contents

Methods

base64urlDecode()  : string|false
Returns base64 decoded value with a URL and filename safe alphabet according to https://tools.ietf.org/html/rfc4648#section-5
base64urlEncode()  : string
Returns base64 encoded value with a URL and filename safe alphabet according to https://tools.ietf.org/html/rfc4648#section-5
cast()  : string|null
Casts applicable types (string, bool, finite numeric) to string.
escapeCssSelector()  : string
Escape a CSS selector to be used for DOM queries
explodeEscaped()  : array<string|int, mixed>
Explodes a string while respecting escape characters
filter()  : string|null
Keeps only string types (filters out non-strings).
getUniqueId()  : string
This function generates a unique id by using the more entropy parameter.
multibyteStringPad()  : string
Works the same as str_pad() except that it correctly handles strings with multibyte characters and takes an additional optional argument $encoding.
removeByteOrderMark()  : string
Removes the Byte Order Mark (BOM) from the input string.
searchStringWildcard()  : bool
Matching two strings against each other, supporting a "*" wildcard (match many) or a "?" wildcard (match one= or (if wrapped in "/") PCRE regular expressions
uniqueList()  : string
Takes a comma-separated list and removes all duplicates.

Methods

base64urlDecode()

Returns base64 decoded value with a URL and filename safe alphabet according to https://tools.ietf.org/html/rfc4648#section-5

public static base64urlDecode(string $value[, bool $strict = false ]) : string|false

The difference to classic base64 is, that the result alphabet is adjusted like shown below, padding (=) is stripped completely:

  • position #62: - (minus) -> +
  • position #63: _ (underscore) -> /
Parameters
$value : string

base64url decoded string

$strict : bool = false

enforces to only allow characters contained in the base64(url) alphabet

Return values
string|false —

raw value, or false if non-base64(url) characters were given in strict mode

base64urlEncode()

Returns base64 encoded value with a URL and filename safe alphabet according to https://tools.ietf.org/html/rfc4648#section-5

public static base64urlEncode(string $value) : string

The difference to classic base64 is, that the result alphabet is adjusted like shown below, padding (=) is stripped completely:

  • position #62: + -> - (minus)
  • position #63: / -> _ (underscore)
Parameters
$value : string

raw value

Return values
string —

base64url encoded string

cast()

Casts applicable types (string, bool, finite numeric) to string.

public static cast(mixed $value[, string|null $default = null ]) : string|null

Any other type will be replaced by the $default value.

Parameters
$value : mixed
$default : string|null = null
Return values
string|null

escapeCssSelector()

Escape a CSS selector to be used for DOM queries

public static escapeCssSelector(string $selector) : string

This method takes care to escape any CSS selector meta character. The result may be used to query the DOM like $('#' + escapedSelector)

Parameters
$selector : string
Return values
string

explodeEscaped()

Explodes a string while respecting escape characters

public static explodeEscaped(string $delimiter, string $subject[, string $escapeCharacter = '\' ]) : array<string|int, mixed>

e.g.: delimiter: '.'; escapeCharacter: ''; subject: 'new.site.child' result: [new.site, child]

Parameters
$delimiter : string
$subject : string
$escapeCharacter : string = '\'
Return values
array<string|int, mixed>

filter()

Keeps only string types (filters out non-strings).

public static filter(mixed $value[, string|null $default = null ]) : string|null

Any other non-string type will be replaced by the $default value.

Parameters
$value : mixed
$default : string|null = null
Return values
string|null

getUniqueId()

This function generates a unique id by using the more entropy parameter.

public static getUniqueId([string $prefix = '' ]) : string

Furthermore, the dots are removed so the id can be used inside HTML attributes e.g. id.

Parameters
$prefix : string = ''
Return values
string

multibyteStringPad()

Works the same as str_pad() except that it correctly handles strings with multibyte characters and takes an additional optional argument $encoding.

public static multibyteStringPad(string $string, int $length[, string $pad_string = ' ' ][, int $pad_type = STR_PAD_RIGHT ][, string $encoding = 'UTF-8' ]) : string
Parameters
$string : string
$length : int
$pad_string : string = ' '
$pad_type : int = STR_PAD_RIGHT
$encoding : string = 'UTF-8'
Return values
string

removeByteOrderMark()

Removes the Byte Order Mark (BOM) from the input string.

public static removeByteOrderMark(string $input) : string

This method supports UTF-8 encoded strings only!

Parameters
$input : string
Return values
string

searchStringWildcard()

Matching two strings against each other, supporting a "*" wildcard (match many) or a "?" wildcard (match one= or (if wrapped in "/") PCRE regular expressions

public static searchStringWildcard(string $haystack, string $needle) : bool
Parameters
$haystack : string

The string in which to find $needle.

$needle : string

The string to find in $haystack

Return values
bool —

Returns TRUE if $needle matches or is found in (according to wildcards) $haystack. E.g. if $haystack is "Netscape 6.5" and $needle is "Net*" or "Net*ape" then it returns TRUE.

uniqueList()

Takes a comma-separated list and removes all duplicates.

public static uniqueList(string $list) : string

If a value in the list is trim(empty), the value is ignored.

Parameters
$list : string

A comma-separated list of values.

Return values
string —

Returns the list without any duplicates of values, space around values are trimmed.


        

        
    




    

    

                            

            

                            
    

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