<?php
/**
* @package ACF
* @author WP Engine
*
* © 2025 Advanced Custom Fields (ACF®). All rights reserved.
* "ACF" is a trademark of WP Engine.
* Licensed under the GNU General Public License v2 or later.
* https://www.gnu.org/licenses/gpl-2.0.html
*/
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly
}
if ( ! class_exists( 'acf_loop' ) ) :
class acf_loop {
/**
* An array of loops.
* @var array
*/
public $loops = array();
/**
* This function will return true if no loops exist
*
* @type function
* @date 3/03/2016
* @since 5.3.2
*
* @param n/a
* @return (boolean)
*/
function is_empty() {
return empty( $this->loops );
}
/**
* This function will return true if a loop exists for the given array index
*
* @type function
* @date 3/03/2016
* @since 5.3.2
*
* @param $i (int)
* @return (boolean)
*/
function is_loop( $i = 0 ) {
return isset( $this->loops[ $i ] );
}
/**
* This function will return a valid array index for the given $i
*
* @type function
* @date 3/03/2016
* @since 5.3.2
*
* @param $i (mixed)
* @return (int)
*/
function get_i( $i = 0 ) {
// 'active'
if ( $i === 'active' ) {
$i = -1;
}
// 'previous'
if ( $i === 'previous' ) {
$i = -2;
}
// allow negative to look at end of loops
if ( $i < 0 ) {
$i = count( $this->loops ) + $i;
}
// return
return $i;
}
/**
* This function will add a new loop
*
* @type function
* @date 3/03/2016
* @since 5.3.2
*
* @param $loop (array)
* @return n/a
*/
function add_loop( $loop = array() ) {
// defaults
$loop = wp_parse_args(
$loop,
array(
'selector' => '',
'name' => '',
'value' => false,
'field' => false,
'i' => -1,
'post_id' => 0,
'key' => '',
)
);
// ensure array
$loop['value'] = acf_get_array( $loop['value'] );
// Re-index values if this loop starts from index 0.
// This allows ajax previews to work ($_POST data contains random unique array keys)
if ( $loop['i'] == -1 ) {
$loop['value'] = array_values( $loop['value'] );
}
// append
$this->loops[] = $loop;
// return
return $loop;
}
/**
* This function will update a loop's setting
*
* @type function
* @date 3/03/2016
* @since 5.3.2
*
* @param $i (mixed)
* @param $key (string) the loop setting name
* @param $value (mixed) the loop setting value
* @return (boolean) true on success
*/
function update_loop( $i = 'active', $key = null, $value = null ) {
// i
$i = $this->get_i( $i );
// bail early if no set
if ( ! $this->is_loop( $i ) ) {
return false;
}
// set
$this->loops[ $i ][ $key ] = $value;
// return
return true;
}
/**
* This function will return a loop, or loop's setting for a given index & key
*
* @type function
* @date 3/03/2016
* @since 5.3.2
*
* @param $i (mixed)
* @param $key (string) the loop setting name
* @return (mixed) false on failure
*/
function get_loop( $i = 'active', $key = null ) {
// i
$i = $this->get_i( $i );
// bail early if no set
if ( ! $this->is_loop( $i ) ) {
return false;
}
// check for key
if ( $key !== null ) {
return $this->loops[ $i ][ $key ];
}
// return
return $this->loops[ $i ];
}
/**
* This function will remove a loop
*
* @type function
* @date 3/03/2016
* @since 5.3.2
*
* @param $i (mixed)
* @return (boolean) true on success
*/
function remove_loop( $i = 'active' ) {
// i
$i = $this->get_i( $i );
// bail early if no set
if ( ! $this->is_loop( $i ) ) {
return false;
}
// remove
unset( $this->loops[ $i ] );
// reset keys
$this->loops = array_values( $this->loops );
// PHP 7.2 no longer resets array keys for empty value
if ( $this->is_empty() ) {
$this->loops = array();
}
}
}
// initialize
acf()->loop = new acf_loop();
endif; // class_exists check
/**
* alias of acf()->loop->add_loop()
*
* @type function
* @date 6/10/13
* @since 5.0.0
*
* @param n/a
* @return n/a
*/
function acf_add_loop( $loop = array() ) {
return acf()->loop->add_loop( $loop );
}
/**
* alias of acf()->loop->update_loop()
*
* @type function
* @date 6/10/13
* @since 5.0.0
*
* @param n/a
* @return n/a
*/
function acf_update_loop( $i = 'active', $key = null, $value = null ) {
return acf()->loop->update_loop( $i, $key, $value );
}
/**
* alias of acf()->loop->get_loop()
*
* @type function
* @date 6/10/13
* @since 5.0.0
*
* @param n/a
* @return n/a
*/
function acf_get_loop( $i = 'active', $key = null ) {
return acf()->loop->get_loop( $i, $key );
}
/**
* alias of acf()->loop->remove_loop()
*
* @type function
* @date 6/10/13
* @since 5.0.0
*
* @param n/a
* @return n/a
*/
function acf_remove_loop( $i = 'active' ) {
return acf()->loop->remove_loop( $i );
}
All system for education purposes only. For more tools: Telegram @jackleet