Example code for reading, updating and deleting Caldera Forms entries. See: https://calderaforms.com/doc/edit-caldera-forms-entries-php/

delete-all.php

<?php
//delete all saved Caldera Forms
$forms = Caldera_Forms_Forms::get_forms( false, true );
if( ! empty( $forms ) ){
   foreach( $forms as $form ){
     Caldera_Forms_Forms::delete_form( $form );
   }
}

delete-caldera-forms-entries.php

 <?php
  	/**
	 * Delete one Caldera Forms entry
	 */
	Caldera_Forms_Entry_Bulk::delete_entries( array( 42 ) );

	/**
	 * Delete multiple Caldera Forms entries
	 */
	Caldera_Forms_Entry_Bulk::delete_entries( array( 42, 88 ) );

edit-caldera-forms-entry.php

<?php	
  	//Make sure to change these IDs to match your needs
	$form_id = 'CF58a360bf5803c';
	$entry_id = 301;
	$field_to_edit_id = 'fld_6856345';

	//get form
	$form = Caldera_Forms_Forms::get_form( $form_id );


	//Get  form entry
	$entry = new Caldera_Forms_Entry( $form, $entry_id );

	//get all fields
	$fields = $entry->get_fields();

	//Get field object of field to edit
	$field_to_edit = $entry->get_field( $field_to_edit_id );

	//Change fields value
	$field_to_edit->value = 'fff';

	//Put modified field back in entry
	$entry->add_field( $field_to_edit );

	//Save entry
	$entry->save();

edit-caldera-forms-field-value.php

<?php
  	//Make sure to change these IDs to match your needs
	$form_id = 'CF58a360bf5803c';
	$entry_id = 301;
	$field_to_edit_id = 'fld_6856345';

	//Update value of one field
	Caldera_Forms_Entry_Update::update_field_value( $field_to_edit_id, $entry_id, 'Hi Shawn' );