It's a php library for fetch and validate fields

1.23 2020-02-01 22:44 UTC

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Last update: 2020-02-01 22:51:36 UTC


It's a PHP library for fetch and validate fields and store messages in different containers(including error, warning, info, and success) depending on the conditions.

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Tutorial Form and Table with PHP

diagram example
It is an example of functionality. A normal example is more complex, even if it's only a few lines of code.


Let's say we want to validate a value an input value (get) called "id", we could do the next things:

  • the default value is the text "ERROR"
  • the type of the value is an integer, so it must returns an integer. It also could be an integer,decimal,string,date,datestring and boolean
  • we add a condition, the value must be equals (eq) to 10. If fails then it returns a message (as error)
  • we add another condition, if the value must be equals (eq) to 30. If fails then it returns an info (not an error)
  • If the operation fails then it returns the default value.
  • And finally, we obtain the "id" from $_GET (parameter url).
$val=new ValidationOne();

$r = $val->def('ERROR')
    ->condition("eq", "It's not equals to 10", 10)
    ->condition("eq", "It's not equals to 30 (info)", 30, 'info')
    ->get('id'); // <-- end of the chain

But, where is the error?. It's in messagelist

var_dump($val->messagelist->allArray()) // here we show all messages of any kind of type. 

However, we could also show a message by type (error, warning..) and only message by specific identifier.

var_dump($val->messageList->get('id')->allErrorOrWarning())) // All error or warning contained in the key "id".

Why the messages are store in some structure?. Is it not easy to simply return the error? .

The answer is a form. Le't say we have a form with 3 fields. If one of them fails, then the error must be visible for each field separately. Also the whole form could have it's own message.

condition ($condition, $message = "", $conditionValue = null, $level = 'error', $key = null)

It adds a condition that it depends on the type of the input.

  • @param string $condition

    string:req,eq,ne,minlen,maxlen,betweenlen,null,notnull,contain,notcontain ,alpha,alphanum,text,regexp,email,url,domain
    fn.object.Class.method where object is a global $object

  • @param string $message

    Message could uses the next variables '%field','%realfield','%value','%comp','%first','%second'

  • @param null $conditionValue

  • @param string $level (error,warning,info,success)

  • @param string $key If key is not null then it is used for add more than one condition by key

  • @return ValidationOne


    ->condition('eq','%field %value is not equal to %comp ',50)
    ->condition('eq','%field %value is not equal to %comp ',60)

Input type x Conditions

Input type Condition
number gt,lt,gte,lte,between
string minlen,maxlen,betweenlen,contain
date gt,lt,gte,lte,between
datestring gt,lt,gte,lte,between
boolean true,false
file minsize,maxsize,req,image,doc,compression,architecture,ext
* (it applies for any type) req,eq,ne,null,notnull,empty,notempty
* function
* fn.static.Class.methodstatic
* fn.global.function
* fn.object.Class.method where object is a global $object
* fn.class.Class.method
* fn.class.\namespace\Class.method


Condition Description Value Example
architecture The extension of the file must be an architecture file
between The number must be between two values [0,20]
betweenlen The lenght of the text must be between two values [0,20]
compression The extension of the file must be an compression file
contain The text must contain a value "text"
doc The extension of the file must be an document file
eq (the value to compare could be an single value or array) The value must be equals to "text",["text","text2"]
exist The file must exists
ext The extension must be in a list of extensions ["ext1","ext2","ext3"]
false The value must be false (===false)
fn.class.\namespace\Class.method The method of a class must returns true
fn.class.Class.method The method of a class must returns true
fn.global.function The global function must returns true
fn.object.Class.method where object is a global $object The method of a global object must returns true
fn.static.Class.methodstatic The static method of a class must returns true
function The function must returns true
gt The value must be greater than 123
gte The value must be greater or equal than 123
image The extension of the file must be an image file
lt The value must be less than 123
lte The value must be less or equal than 123
maxlen The maximum lenght of a string 123
maxsize The maximum size of a file 123
minlen The minimum lenght of a string 123
minsize The minimum size of a file 123
mime (the value to compare could be an string or array) The mime type of a file "application/msword" or ["application/msword","image/gif"]
mimetype The mime type (without subtype) of a file "application" or ["application,"image"]
ne (the value to compare could be an single value or array) The value must not be equals. 123,[123,345],["aa","bb"]
notcontain The value must not contain a value "text"
notexist The file must not exist
notnull The value must not be null
null The value must be null
empty The value must be empty (i.e. "",0,null)
notempty The value must not be empty (i.e. not equals to "",0,null)
req The value must be equal
true The value must be true (===true)


    ->condition('eq','%field %value is not equal to %comp ',50)
    ->condition('between','%field %value must be between 1 and 50 ',[1,50])
    ->condition('eq','%field %value is not equal to %comp ',60)
    ->condition('eq','%field %value is not equal to %comp ',[60,200]) // eq allows a single or array
    ->condition('fn.static.Example.customval','la funcion no funciona')
    ->condition('lt',"es muy grande",2000,'warning')
    ->condition('eq','%field %value is not equal to %comp',50)
    ->condition('fn.static.Example.fnstatic','la funcion estatica no funciona')
    ->condition('fn.global.customval','la funcion global no funciona')
    ->condition('fn.object.example.fnnostatic','la funcion object no funciona')
    ->condition('fn.class.\somespace\Someclass.method','la funcion someclass no funciona')
    ->condition('fn.class.Example.fnnostatic','la funcion class no funciona');

// ->condition('fn.static.Example.customval','la funcion no funciona') 
function customval($value,$compareValue) {
    return true;


MessageList is a list of containers of messages. It's aimed for convenience, so it features many methods to access of the information in different ways.

Messages are cataloged as follow

id Description Example
error The message is an error and it must be solved. It is a show stopper. Database is down
warning The message is a warning that maybe it could be ignored. The registry was stored but with warnings
info The message is an information Log is stored
success The message is a succesful operation Order Accepted

Sometimes, both errors are warning are considered as equals. So the system allows to read an error or warning.

Error has always the priority, then warning, info and success. If you want to read the first message, then it starts searching for errors.

You can obtain a message as an array of objects of the type MessageItem, as an array of string, or as an a single string (first message)


  • Input value, it could come from set()/post()/get()/request()/getFile()
  • What if the value doesn't exist?

version list

  • 2020-02-01 1.23

    • Solved a problem in endConversion() when the default value is "" or null (or not a DateTime object), the type is "datetimestring" and the value is missing.
    • Practically all methods were tested.
    • resetValidation() now allows to delete all messages.
    • Fixed the validation "ne"
  • 2020-01-04 1.22

    • New conditions 'mime','minetype','exist','notexist',etc.
    • Condition 'eq' and 'ne' allows a simple or an array of values.
  • 2020-01-03 1.21

    • ValidationOne::runConditions() now allows (for file type), conditions architecture and compression
    • ValidationOne::getFileExtension() now could return the extension as mime
    • ValidationOne::getFileMime() new method that returns the mime type of a file.
  • 2019-11-27 1.20

    • Fixed name countErrorOrWaring->countErrorOrWarning
  • 2019-11-27 1.19

    • Added new field MessageList.errorOrWarning
    • Added new method MessageItem.countErrorOrWaring()
  • 2019-10.01 1.18 Added compatibility for phpunit/phpunit 5.7 and 6.5

  • 2019-10-01 1.17 Fixed a bug. If the input is zero, then it is considered as null.

  • 2019-08-10 1.16 Solved a problem with the datestring/datetimestring.

  • 2019-08-07 1.15

    • Added the type datestring and datetimestring. It reads a string and it converts into another string (as date or datetime)
    • Code formatted
  • 2019-03-08 1.14 Added getFile() to upload a file.

  • 2018-12-15 1.13 Added phpunit and travis.

  • 2018-10-29 1.12 getFile now it's available via ValidationOne()

  • 2018-10-22 1.11 Some fixes. Now isEmpty is called isMissing

  • 2018-10-22 1.10 New Features

    • Added ValidationInputOne, now the fetchs are done by this class (SRP principle)
    • Added a fix with the input, when the value expected is an array but it's returned a single value
  • 2018-10-15 1.9 Added some extra features

  • 2018-10-15 1.8 Some fixes and phpdocs, a new example

  • 2018-10-15 1.7 Added method addMessage() in ValidationOne. Now ErrorItem/ErrorList is called MessageItem and MessageList

  • 2018-10-06 1.5 added method first() in MessageItem

  • 2018-10-03 1.4 added defaultNatural()

  • 2018-10-02 1.3 basicvalidation() was deleted. It was restored.

  • 2018-10-02 1.2 array() is now isArray()

  • 2018-09-30 1.1 Some fixes

  • 2018-09-29 1.0 first version


  • More examples
  • Documentation


It's distributed as dual license, as lgpl-v3 and commercial.

You can use freely in your close source project. However, if you change this library, then the changes must be disclosed.