Gravity Forms: Require minimum/maximum characters in input field - wordpress

Question

is it possible to limit the characters in an input field for every form we have?
I need an input field with exact 5 numbers (zip field).
I found this solution:
(full code here: https://gravitywiz.com/require-minimum-character-limit-gravity-forms/)
new GW_Minimum_Characters( array(
'form_id' => 524,
'field_id' => 1,
'min_chars' => 4,
'max_chars' => 5,
'min_validation_message' => __( 'Oops! You need to enter at least %s characters.' ),
'max_validation_message' => __( 'Oops! You can only enter %s characters.')
)
);
The problem is, that we have dozens of forms and couldn't build a function for all of them ;)
So we couldn't use the "form_id" and the "field_id".
Maybe there is a way to use a parameter name for the input field?

Answer 1

I had a similar issue where I needed to have minimum no. of characters for text fields and textarea. This setting had to be used in different forms and multiple fields therefore I could not add filters with pre-defined form ids and field ids.
What I did is that I created a new setting which was visible when editing a field and then I validated the submission. You can use the code below:
add_action( 'gform_field_standard_settings', 'minimum_field_setting', 10 );
add_action( 'gform_editor_js', 'editor_script' );
add_filter( 'gform_tooltips', 'add_encryption_tooltips' );
add_filter( 'gform_validation', 'general_validation' );
/**
* Adds the Minimum Characters Field to Form Fields
*
* #param integer $position
*/
function minimum_field_setting( $position ) {
//Position: Underneath Description TextArea
if ( $position == 75 ) {
?>
<li class="minlen_setting field_setting">
<label for="field_minlen" class="section_label">
<?php esc_html_e( 'Minimum Characters', 'gravityforms' ); ?>
<?php gform_tooltip( 'form_field_minlen' ) ?>
</label>
<input type="number"
id="field_minlen"
onblur="SetFieldProperty('minLength', this.value);"
value=""
/>
</li>
<?php
}
}
/**
* Adds Javascript to Gravity Forms in order to render the new setting field in their appropriate field types
*/
function editor_script() {
?>
<script type='text/javascript'>
//Append field setting only to text and textarea fields
jQuery.each(fieldSettings, function (index, value) {
if (index === 'textarea' || index === 'text') {
fieldSettings[index] += ", .minlen_setting";
}
});
//binding to the load field settings event to initialize the checkbox
jQuery(document).bind("gform_load_field_settings", function (event, field, form) {
if (field.type === 'textarea' || field.type === 'text') {
console.log(field);
if (typeof field.minLength !== "undefined") {
jQuery("#field_minlen").attr("value", field.minLength);
} else {
jQuery("#field_minlen").attr("value", '');
}
}
});
</script>
<?php
}
/**
* Add GF Tooltip for Minimum Length
*
* #param array $tooltips
*
* #return mixed
*/
function add_encryption_tooltips( $tooltips ) {
$tooltips['form_field_minlen'] = "<h6>Minimum Length</h6>Minimum number of characters for this field";
return $tooltips;
}
/**
* Validate Form Submission
*
* #param array $validation_result
*
* #return mixed
*/
function general_validation( $validation_result ) {
$form = $validation_result['form'];
foreach ( $form['fields'] as &$field ) {
if ( in_array( $field->type, [ 'text', 'textarea' ] ) && ! empty( $field->minLength ) ) {
$input_name = 'input_' . $field->id;
if ( isset( $_POST[ $input_name ] ) && $_POST[ $input_name ] != '' ) {
if ( strlen( $_POST[ $input_name ] ) < (int) $field->minLength ) {
$field->failed_validation = true;
$field->validation_message = 'Field must contain at least ' . $field->minLength . ' characters';
$validation_result['is_valid'] = false;
}
}
}
}
$validation_result['form'] = $form;
return $validation_result;
}
You can change the setting from Minimum Length to Exact Length and then update the validation accordingly.