Runs the validation routines. You can optionally pass the name of the validation group via the method, as described in: Saving Sets of Validation Rules to a Config File. Permits you to set custom error messages. See Setting Error Messages. Permits you to reset the validation when you validate more than one array. This method should be called before validating each new array.
Please refer to the Form Helper manual for the following functions:. Docs » Libraries » Form Validation. You fill it in and submit it. If you submitted something invalid, or perhaps missed a required item, the form is redisplayed containing your data along with an error message describing the problem. This process continues until you have submitted a valid form. On the receiving end, the script must: Check for required data. Verify that the data is of the correct type, and meets the correct criteria.
For example, if a username is submitted it must be validated to contain only permitted characters. It must be of a minimum length, and not exceed a maximum length.
Sanitize the data for security. Pre-format the data if needed Does the data need to be trimmed? HTML encoded? Prep the data for insertion in the database. A controller method to receive and process the submitted data. Try it! Note If you would like the field name to be stored in a language file, please see Translating Field Names.
Note The form fields are not yet being re-populated with the data when there is an error. Note You will generally want to use the prepping functions after the validation rules so if there is an error, the original data will be shown in the form.
Important If you use an array as the name of a form field, you must supply it as an array to the function. Note You can also process the form data that is passed to your callback and return it. Note: This rule requires Query Builder to be enabled in order to work. Should be used after trim to avoid spaces at the beginning or end. Note These rules can also be called as discrete methods. Note You can also use any native PHP functions that permit up to two parameters, where at least one is required to pass the field data.
Note You can also use any native PHP functions that permits one parameter, like trim , htmlspecialchars , urldecode , etc. Returns FALSE if the form element contains anything other than alpha-numeric characters, underscores or dashes.
You can minimally pass the field name and value in the first and second parameter:. If you would like your form to contain some additional data, like JavaScript, you can pass it as a string in the third parameter:.
Instead of the maxlength and size attributes in the above example, you will instead specify rows and cols. Lets you create a standard drop-down field.
The first parameter will contain the name of the field, the second parameter will contain an associative array of options, and the third parameter will contain the value you wish to be selected. You can also pass an array of multiple items through the third parameter, and CodeIgniter will create a multiple select for you.
Lets you create a standard multiselect field. The first parameter will contain the name of the field, the second parameter will contain an associative array of options, and the third parameter will contain the value or values you wish to be selected.
Similar to other functions, you can submit an associative array in the second parameter if you prefer to set additional attributes:. The only advantage to using this function is it permits you to pass data to it which will be added below the tag.
For example. Similar to the other form functions in this helper, you can also pass an array of attributes to the function:. Also as with other functions, if you would like the tag to contain additional data like JavaScript, you can pass it as a string in the fourth parameter:.
Similar to other functions, you can submit an associative array in the third parameter if you prefer to set additional attributes. You will see the result. It must be either Save or SaveNew. Show 2 more comments. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta.
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