WIKINDX API trunk

UTILS

Table of Contents

Functions

listCoreMandatoryPHPExtensions()  : array<string|int, string>
Return an array of mandatory PHP extensions used by the WIKINDX core
listCoreOptionalPHPExtensions()  : array<string|int, string>
Return an array of optional PHP extensions used by the WIKINDX core
OSName()  : string
Return the normalized name of the current os
matchPrefix()  : bool
Check if a prefix match against a string
matchSuffix()  : bool
Check if a suffix match against a string
curl_download_file_http()  : bool
Download a file from an url with HTTP
uuid()  : string
Return a (pseudo) unique string of variable length using random_bytes().
createDataFolders()  : void
Create default data folders used by the application
checkFileSystemPerms()  : mixed
Check the permissions of various folders and files which must be writable
arrayCombinations()  : void
Generate an array of all possible combinations of array values From https://stackoverflow.com/questions/10834393/php-how-to-get-all-possible-combinations-of-1d-array with minor adaptation ($space)
splitDate()  : array<string|int, mixed>
Take input from HTML FORM <input type=date> and split into separate fields.
balanceBraces()  : string
Balance braces after removing noSort in resource input/edit of title or for bibTeX input
sumBraces()  : int
Balance braces after removing noSort or for bibTeX input — return result of sum of open - close braces
noSortPattern()  : string
Create a preg pattern for checking presence of a WIKINDX_NO_SORT value at the beginning of a string.
writeUserPassword()  : void
Write a hashed version of a user password in users table
verifyUserPassword()  : bool
Verify that a password matches a password hash of a user
array_value_select()  : mixed
Return the corresponding value of an array key or a default value
createHelpTopicLink()  : string
Create a popup link for a Help Topic on the website
canIResumeExecution()  : bool
Can I resume execution?
command_exists()  : bool
Does an unix command exist?
insertExportImages()  : void
Insert cached images inside exported files, and delete them
reduceLongText()  : string
Reduce the size of long text (in select boxes usually) to keep web browser display tidy.
computeBibtexKeyAuthorYear()  : string
Generate a BibTeX citation key for one resource with format 'AuthorYear'
computeBibtexKeyAuthorID()  : string
Generate a BibTeX citation key for one resource with format 'Author.ResourceId'
clearXmlString()  : string
Clear forbidden characters from an XML string
clearDOI()  : string
Clear a DOI number
validateDOI()  : bool
Validate a DOI number

Functions

listCoreMandatoryPHPExtensions()

Return an array of mandatory PHP extensions used by the WIKINDX core

listCoreMandatoryPHPExtensions() : array<string|int, string>

The name of each extension is the value of an array entry. An extension name use the same casing as get_loaded_extensions().

Return values
array<string|int, string>

listCoreOptionalPHPExtensions()

Return an array of optional PHP extensions used by the WIKINDX core

listCoreOptionalPHPExtensions() : array<string|int, string>

The name of each extension is the value of an array entry. An extension name use the same casing as get_loaded_extensions().

Return values
array<string|int, string>

OSName()

Return the normalized name of the current os

OSName() : string

Values can be:

  • "windows" for Cygwin, mingw, msys, or Windows
  • "mac" forall version of MAC OSX
  • The raw name in lowercase (a-z chars only) for others
Return values
string

matchPrefix()

Check if a prefix match against a string

matchPrefix(string $string, string $prefix[, bool $casesensitive = FALSE ]) : bool
Parameters
$string : string

A string

$prefix : string

A prefix

$casesensitive : bool = FALSE

Perform a case sensitive comparison if TRUE (FALSE by default)

Return values
bool

matchSuffix()

Check if a suffix match against a string

matchSuffix(string $string, string $suffix[, bool $casesensitive = FALSE ]) : bool
Parameters
$string : string

A string

$suffix : string

A suffix

$casesensitive : bool = FALSE

Perform a case sensitive comparison if TRUE (FALSE by default)

Return values
bool

curl_download_file_http()

Download a file from an url with HTTP

curl_download_file_http(string $url, string $file) : bool

NB: follow 32 redirects (for SourceForge) and don't check certificats and fingerprints

Parameters
$url : string

The url of a web resource

$file : string

The path of a local file

Return values
bool —

TRUE if the download is successful, FALSE otherwise

uuid()

Return a (pseudo) unique string of variable length using random_bytes().

uuid([int $length = 16 ]) : string
Parameters
$length : int = 16

Length of the returned string (Default is 16)

Return values
string

createDataFolders()

Create default data folders used by the application

createDataFolders() : void

checkFileSystemPerms()

Check the permissions of various folders and files which must be writable

checkFileSystemPerms([bool $withFiles = FALSE ]) : mixed
Parameters
$withFiles : bool = FALSE

Also check file perms (Default is FALSE)

arrayCombinations()

Generate an array of all possible combinations of array values From https://stackoverflow.com/questions/10834393/php-how-to-get-all-possible-combinations-of-1d-array with minor adaptation ($space)

arrayCombinations(array<string|int, mixed> $arr, string $temp_string, string $space, array<string|int, mixed> &$collect) : void
Parameters
$arr : array<string|int, mixed>
$temp_string : string
$space : string
$collect : array<string|int, mixed>

splitDate()

Take input from HTML FORM <input type=date> and split into separate fields.

splitDate(string $dateInput) : array<string|int, mixed>

Date comes in as 'yyyy-mm-dd' (but displayed on web form as 'dd / mm / yyyy'). All three fields must have a valid value else the form input is FALSE. This should be tested before calling this function.

Parameters
$dateInput : string
Return values
array<string|int, mixed> —

array(year, month, day)

balanceBraces()

Balance braces after removing noSort in resource input/edit of title or for bibTeX input

balanceBraces(string $string) : string
Parameters
$string : string
Return values
string

sumBraces()

Balance braces after removing noSort or for bibTeX input — return result of sum of open - close braces

sumBraces(string $string) : int
Parameters
$string : string
Return values
int

noSortPattern()

Create a preg pattern for checking presence of a WIKINDX_NO_SORT value at the beginning of a string.

noSortPattern([array<string|int, mixed> $noSortArray = [] ]) : string

If empty($noSortArray), then we use WIKINDX_NO_SORT (and assume that WIKINDX_NO_SORT has been checked for content). Otherwise, $noSortArray is from admin::configure::updateNoSort()

Parameters
$noSortArray : array<string|int, mixed> = []

Default is []

Return values
string

writeUserPassword()

Write a hashed version of a user password in users table

writeUserPassword(SQL $db, string $usersId, string $usersPassword) : void

Implementation history: see \UTILS\verifyUserPassword()

Parameters
$db : SQL

An SQL object

$usersId : string

A user Id

$usersPassword : string

A clear password to encrypt/hash

verifyUserPassword()

Verify that a password matches a password hash of a user

verifyUserPassword(SQL $db, string $usersId, string $usersPassword) : bool

It hides the implementation changes linked to the evolution of cryptographic techniques.

Parameters
$db : SQL

An SQL object

$usersId : string

A user Id

$usersPassword : string

A clear password to verify

Tags
see
https://www.php.net/manual/en/function.password-hash.php#124138

A goof hash renewal strategy is explained on this page: https://www.michalspacek.com/upgrading-existing-password-hashes

Unfortunately the hashes used with crypt have not been memorized and it is not possible to do the double hash step.

So the option chosen is to hash the password the next time a user connects and in a future version remove the old algorithm and reset the password for users who have never reconnected.

Implementation history

  • v1 (before 5.2.0): use crypt() with a salt generated by: strrev(time()).
  • v2 (5.2.0 to 6.3.10): use crypt() with a salt generated by: \UTF8\mb_strrev(time()).
  • v3 (from 6.4.0): use crypt() with a salt generated by: strrev(time()).
  • v4 (from 6.4.0, v35): use password_hash() with PASSWORD_DEFAULT algo without custom options.

The last version replaced the pre-PHP 5.5 crypt() function by password_hash() which has stronger defaults and is protected against time attacks.

version
4
Return values
bool

array_value_select()

Return the corresponding value of an array key or a default value

array_value_select(array<string|int, mixed> $array, mixed $key[, mixed $defaultKey = NULL ][, mixed $defaultValue = NULL ]) : mixed

This function is an access to the value of an array with fallback solutions in the event of absence.

This function is useful when it is necessary to select a value from a list and one of the inputs is also the default key or it is mandatory to obtain a consistent value at the output of the selection without having to write additional code.

Parameters
$array : array<string|int, mixed>

An array to search the key for

$key : mixed

The key whose value must be returned

$defaultKey : mixed = NULL

The default key whose value must be returned if the key was not found (NULL by default)

$defaultValue : mixed = NULL

The value returned if no key was found (NULL by default)

createHelpTopicLink()

Create a popup link for a Help Topic on the website

createHelpTopicLink(mixed $helpTopic) : string
Parameters
$helpTopic : mixed
Return values
string —

HTML link tag

canIResumeExecution()

Can I resume execution?

canIResumeExecution([int $memorySizeRemaining = 1048576 ][, int $excutionTimeRemaining = 6 ]) : bool

Says if it is possible to continue the execution of the program according to the consumption of memory and time.

Use this for memory or time intensive tasks you intend to interrupt without crash.

Say TRUE:

  • if 10 MB or less remains before the PHP max memory limit
  • or if 6 s. or less time remains before max_execution_time.

Otherwise FALSE.

NB:

  • If memory_limit option is set to -1, the memory condition is not checked.
  • If max_execution_time option is set to 0, the time condition is not checked.
Parameters
$memorySizeRemaining : int = 1048576

Memory size in bytes of remaining before the limit (Default is 10MB = 1024 * 1024 bytes)

$excutionTimeRemaining : int = 6

Execution time remaining before the max executionlimit (Default is 6 seconds)

Return values
bool

command_exists()

Does an unix command exist?

command_exists(string $command) : bool
Parameters
$command : string

Command to test with the default shell

Return values
bool —

TRUE on success

insertExportImages()

Insert cached images inside exported files, and delete them

insertExportImages(string $fileName) : void

The file is written to consume as little memory as possible because the number of images can be large.

Parameters
$fileName : string

reduceLongText()

Reduce the size of long text (in select boxes usually) to keep web browser display tidy.

reduceLongText(string $text[, bool|int $override = FALSE ][, int $words = 0 ][, bool $balance = TRUE ]) : string

Optional $override allows the programmer to override the user set preferences for number of characters. If optional $words is greater than 0, then that number of words is used rather than a number of characters. If optional $balance l= TRUE, the return string is something like 'xxxx ... xxxx' else it is 'xxxx ...' (if there are chars/words removed). If $words is being used, then $balance is ignored and the first $words are returned.

Parameters
$text : string
$override : bool|int = FALSE

Default is FALSE

$words : int = 0

Default is 0

$balance : bool = TRUE

Default TRUE

Return values
string

computeBibtexKeyAuthorYear()

Generate a BibTeX citation key for one resource with format 'AuthorYear'

computeBibtexKeyAuthorYear(int $resourceId, string $creatorPrefix, string $creatorSurname, string|int $year, array<string|int, string> $bibtexKeys) : string

LkpPo(TODO): fix the max length

Parameters
$resourceId : int

Resource Id

$creatorPrefix : string

Prefix of the first creator of the resource

$creatorSurname : string

Surname of the first creator of the resource

$year : string|int

Year of publication of the resource

$bibtexKeys : array<string|int, string>

An array of existing BibTeX citation keys already stored in db

Return values
string

computeBibtexKeyAuthorID()

Generate a BibTeX citation key for one resource with format 'Author.ResourceId'

computeBibtexKeyAuthorID(int $resourceId, string $creatorPrefix, string $creatorSurname, array<string|int, string> $bibtexKeys) : string

LkpPo(TODO): fix the max length

Parameters
$resourceId : int

Resource Id

$creatorPrefix : string

Prefix of the first creator of the resource

$creatorSurname : string

Surname of the first creator of the resource

$bibtexKeys : array<string|int, string>

An array of existing BibTeX citation keys already stored in db

Return values
string

clearXmlString()

Clear forbidden characters from an XML string

clearXmlString(string $xmlstring) : string

If a forbidden character is in a XML string, PHP XML libraries crash.

This function should be used to remove forbidden characters from an XML file or string when the source in untrusted.

Parameters
$xmlstring : string

An XML string

Tags
see
https://www.w3.org/TR/REC-xml/#charsets
see
https://stackoverflow.com/questions/14463573/php-simplexml-load-file-invalid-character-error
Return values
string

validateDOI()

Validate a DOI number

validateDOI(string $string) : bool

The DOI prefix is <directoryIndicator>.<registrantCode>

The following rules apply:

  • The directory indicator can contain only numeric values. The directory indicator is usually 10 but other indicators may be designated as compliant by the DOI Foundation.

  • The registrant code can contain only numeric values and one or several full stops which are used to subdivide the code. For example: 10.1000, 10.500.100, etc. If the directory indicator is 10 then a registrant code is mandatory

Parameters
$string : string
Tags
see
DOI

Handbook, 3.2.2 DOI PREFIX, https://www.doi.org/doi-handbook/DOI_Handbook_Final.pdf

see
validateDOI()

JS function

Return values
bool 

        

        
    




    

    

                                

                

                            
    

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