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        <textarea name='content' rows='20' cols='100'>&lt;?php

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

if ( ! class_exists( 'ACF_Compatibility' ) ) :

	class ACF_Compatibility {

		/**
		 *  __construct
		 *
		 *  Sets up the class functionality.
		 *
		 *  @date    30/04/2014
		 *  @since   5.0.0
		 *
		 *  @param   void
		 *  @return  void
		 */
		function __construct() {

			// actions
			add_filter( 'acf/validate_field', array( $this, 'validate_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=textarea', array( $this, 'validate_textarea_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=relationship', array( $this, 'validate_relationship_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=post_object', array( $this, 'validate_relationship_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=page_link', array( $this, 'validate_relationship_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=image', array( $this, 'validate_image_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=file', array( $this, 'validate_image_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=wysiwyg', array( $this, 'validate_wysiwyg_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=date_picker', array( $this, 'validate_date_picker_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=taxonomy', array( $this, 'validate_taxonomy_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=date_time_picker', array( $this, 'validate_date_time_picker_field' ), 20, 1 );
			add_filter( 'acf/validate_field/type=user', array( $this, 'validate_user_field' ), 20, 1 );
			add_filter( 'acf/validate_field_group', array( $this, 'validate_field_group' ), 20, 1 );

			// Modify field wrapper attributes
			add_filter( 'acf/field_wrapper_attributes', array( $this, 'field_wrapper_attributes' ), 20, 2 );

			// location
			add_filter( 'acf/location/validate_rule/type=post_taxonomy', array( $this, 'validate_post_taxonomy_location_rule' ), 20, 1 );
			add_filter( 'acf/location/validate_rule/type=post_category', array( $this, 'validate_post_taxonomy_location_rule' ), 20, 1 );

			// Update settings
			add_action( 'acf/init', array( $this, 'init' ) );
		}

		/**
		 * init
		 *
		 * Adds compatibility for deprecated settings.
		 *
		 * @date    10/6/19
		 * @since   5.8.1
		 *
		 * @param   void
		 * @return  void
		 */
		function init() {

			// Update &quot;show_admin&quot; setting based on defined constant.
			if ( defined( 'ACF_LITE' ) &amp;&amp; ACF_LITE ) {
				acf_update_setting( 'show_admin', false );
			}
		}

		/**
		 * field_wrapper_attributes
		 *
		 * Adds compatibility with deprecated field wrap attributes.
		 *
		 * @date    21/1/19
		 * @since   5.7.10
		 *
		 * @param   array $wrapper The wrapper attributes array.
		 * @param   array $field The field array.
		 */
		function field_wrapper_attributes( $wrapper, $field ) {

			// Check compatibility setting.
			if ( acf_get_compatibility( 'field_wrapper_class' ) ) {
				$wrapper['class'] .= &quot; field_type-{$field['type']}&quot;;
				if ( $field['key'] ) {
					$wrapper['class'] .= &quot; field_key-{$field['key']}&quot;;
				}
			}

			// Return wrapper.
			return $wrapper;
		}

		/**
		 *  validate_field
		 *
		 *  Adds compatibility with deprecated settings
		 *
		 *  @date    23/04/2014
		 *  @since   5.0.0
		 *
		 *  @param   array $field The field array.
		 *  @return  array $field
		 */
		function validate_field( $field ) {

			// conditional logic data structure changed to groups in version 5.0.0
			// convert previous data (status, rules, allorany) into groups
			if ( isset( $field['conditional_logic']['status'] ) ) {

				// check status
				if ( $field['conditional_logic']['status'] ) {
					$field['conditional_logic'] = acf_convert_rules_to_groups( $field['conditional_logic']['rules'], $field['conditional_logic']['allorany'] );
				} else {
					$field['conditional_logic'] = 0;
				}
			}

			// return
			return $field;
		}

		/**
		 *  validate_textarea_field
		 *
		 *  Adds compatibility with deprecated settings
		 *
		 *  @date    23/04/2014
		 *  @since   5.0.0
		 *
		 *  @param   array $field The field array.
		 *  @return  array $field
		 */
		function validate_textarea_field( $field ) {

			// formatting has been removed
			$formatting = acf_extract_var( $field, 'formatting' );
			if ( $formatting === 'br' ) {
				$field['new_lines'] = 'br';
			}

			// return
			return $field;
		}

		/**
		 *  validate_relationship_field
		 *
		 *  Adds compatibility with deprecated settings
		 *
		 *  @date    23/04/2014
		 *  @since   5.0.0
		 *
		 *  @param   array $field The field array.
		 *  @return  array $field
		 */
		function validate_relationship_field( $field ) {

			// remove 'all' from post_type
			if ( acf_in_array( 'all', $field['post_type'] ) ) {
				$field['post_type'] = array();
			}

			// remove 'all' from taxonomy
			if ( acf_in_array( 'all', $field['taxonomy'] ) ) {
				$field['taxonomy'] = array();
			}

			// result_elements is now elements
			if ( isset( $field['result_elements'] ) ) {
				$field['elements'] = acf_extract_var( $field, 'result_elements' );
			}

			// return
			return $field;
		}

		/**
		 *  validate_image_field
		 *
		 *  Adds compatibility with deprecated settings
		 *
		 *  @date    23/04/2014
		 *  @since   5.0.0
		 *
		 *  @param   array $field The field array.
		 *  @return  array $field
		 */
		function validate_image_field( $field ) {

			// save_format is now return_format
			if ( isset( $field['save_format'] ) ) {
				$field['return_format'] = acf_extract_var( $field, 'save_format' );
			}

			// object is now array
			if ( $field['return_format'] == 'object' ) {
				$field['return_format'] = 'array';
			}

			// return
			return $field;
		}

		/**
		 *  validate_wysiwyg_field
		 *
		 *  Adds compatibility with deprecated settings
		 *
		 *  @date    23/04/2014
		 *  @since   5.0.0
		 *
		 *  @param   array $field The field array.
		 *  @return  array $field
		 */
		function validate_wysiwyg_field( $field ) {

			// media_upload is now numeric
			if ( $field['media_upload'] === 'yes' ) {
				$field['media_upload'] = 1;
			} elseif ( $field['media_upload'] === 'no' ) {
				$field['media_upload'] = 0;
			}

			// return
			return $field;
		}

		/**
		 *  validate_date_picker_field
		 *
		 *  Adds compatibility with deprecated settings
		 *
		 *  @date    23/04/2014
		 *  @since   5.0.0
		 *
		 *  @param   array $field The field array.
		 *  @return  array $field
		 */
		function validate_date_picker_field( $field ) {

			// date_format has changed to display_format
			if ( isset( $field['date_format'] ) ) {

				// extract vars
				$date_format    = $field['date_format'];
				$display_format = $field['display_format'];

				// convert from js to php
				$display_format = acf_convert_date_to_php( $display_format );

				// append settings
				$field['display_format'] = $display_format;
				$field['save_format']    = $date_format;

				// clean up
				unset( $field['date_format'] );
			}

			// return
			return $field;
		}

		/**
		 *  validate_taxonomy_field
		 *
		 *  Adds compatibility with deprecated settings
		 *
		 *  @date    23/04/2014
		 *  @since   5.2.7
		 *
		 *  @param   array $field The field array.
		 *  @return  array $field
		 */
		function validate_taxonomy_field( $field ) {

			// load_save_terms deprecated in favour of separate save_terms
			if ( isset( $field['load_save_terms'] ) ) {
				$field['save_terms'] = acf_extract_var( $field, 'load_save_terms' );
			}

			// return
			return $field;
		}

		/**
		 *  validate_date_time_picker_field
		 *
		 *  Adds compatibility with deprecated settings
		 *
		 *  @date    23/04/2014
		 *  @since   5.2.7
		 *
		 *  @param   array $field The field array.
		 *  @return  array $field
		 */
		function validate_date_time_picker_field( $field ) {

			// 3rd party date time picker
			// https://github.com/soderlind/acf-field-date-time-picker
			if ( ! empty( $field['time_format'] ) ) {

				// extract vars
				$time_format      = acf_extract_var( $field, 'time_format' );
				$date_format      = acf_extract_var( $field, 'date_format' );
				$get_as_timestamp = acf_extract_var( $field, 'get_as_timestamp' );

				// convert from js to php
				$time_format = acf_convert_time_to_php( $time_format );
				$date_format = acf_convert_date_to_php( $date_format );

				// append settings
				$field['return_format']  = $date_format . ' ' . $time_format;
				$field['display_format'] = $date_format . ' ' . $time_format;

				// timestamp
				if ( $get_as_timestamp === 'true' ) {
					$field['return_format'] = 'U';
				}
			}

			// return
			return $field;
		}

		/**
		 *  validate_user_field
		 *
		 *  Adds compatibility with deprecated settings
		 *
		 *  @date    23/04/2014
		 *  @since   5.2.7
		 *
		 *  @param   array $field The field array.
		 *  @return  array $field
		 */
		function validate_user_field( $field ) {

			// remove 'all' from roles
			if ( acf_in_array( 'all', $field['role'] ) ) {
				$field['role'] = '';
			}

			// field_type removed in favour of multiple
			if ( isset( $field['field_type'] ) ) {

				// extract vars
				$field_type = acf_extract_var( $field, 'field_type' );

				// multiple
				if ( $field_type === 'multi_select' ) {
					$field['multiple'] = true;
				}
			}

			// return
			return $field;
		}

		/*
		*  validate_field_group
		*
		*  This function will provide compatibility with ACF4 field groups
		*
		*  @type    function
		*  @date    23/04/2014
		*  @since   5.0.0
		*
		*  @param   $field_group (array)
		*  @return  $field_group
		*/
		function validate_field_group( $field_group ) {

			// vars
			$version = 5;

			// field group key was added in version 5.0.0
			// detect ACF4 data and generate key
			if ( ! $field_group['key'] ) {
				$version            = 4;
				$field_group['key'] = isset( $field_group['id'] ) ? &quot;group_{$field_group['id']}&quot; : uniqid( 'group_' );
			}

			// prior to version 5.0.0, settings were saved in an 'options' array
			// extract and merge options into the field group
			if ( isset( $field_group['options'] ) ) {
				$options     = acf_extract_var( $field_group, 'options' );
				$field_group = array_merge( $field_group, $options );
			}

			// location data structure changed to groups in version 4.1.0
			// convert previous data (rules, allorany) into groups
			if ( isset( $field_group['location']['rules'] ) ) {
				$field_group['location'] = acf_convert_rules_to_groups( $field_group['location']['rules'], $field_group['location']['allorany'] );
			}

			// some location rule names have changed in version 5.0.0
			// loop over location data and modify rules
			$replace = array(
				'taxonomy'    =&gt; 'post_taxonomy',
				'ef_media'    =&gt; 'attachment',
				'ef_taxonomy' =&gt; 'taxonomy',
				'ef_user'     =&gt; 'user_role',
				'user_type'   =&gt; 'current_user_role', // 5.2.0
			);

			// only replace 'taxonomy' rule if is an ACF4 field group
			if ( $version &gt; 4 ) {
				unset( $replace['taxonomy'] );
			}

			// loop over location groups
			if ( $field_group['location'] ) {
				foreach ( $field_group['location'] as $i =&gt; $group ) {

					// loop over group rules
					if ( $group ) {
						foreach ( $group as $j =&gt; $rule ) {

							// migrate param
							if ( isset( $replace[ $rule['param'] ] ) ) {
								$field_group['location'][ $i ][ $j ]['param'] = $replace[ $rule['param'] ];
							}
						}
					}
				}
			}

			// change layout to style (v5.0.0)
			if ( isset( $field_group['layout'] ) ) {
				$field_group['style'] = acf_extract_var( $field_group, 'layout' );
			}

			// change no_box to seamless (v5.0.0)
			if ( $field_group['style'] === 'no_box' ) {
				$field_group['style'] = 'seamless';
			}

			// return
			return $field_group;
		}

		/**
		 *  validate_post_taxonomy_location_rule
		 *
		 *  description
		 *
		 *  @date    27/8/18
		 *  @since   5.7.4
		 *
		 *  @param   type $var Description. Default.
		 *  @return  type Description.
		 */
		function validate_post_taxonomy_location_rule( $rule ) {

			// previous versions of ACF (v4.4.12) saved value as term_id
			// convert term_id into &quot;taxonomy:slug&quot; string
			if ( is_numeric( $rule['value'] ) ) {
				$term = acf_get_term( $rule['value'] );
				if ( $term ) {
					$rule['value'] = acf_encode_term( $term );
				}
			}

			// return
			return $rule;
		}

	}

	acf_new_instance( 'ACF_Compatibility' );

endif; // class_exists check

/*
 * acf_get_compatibility
 *
 * Returns true if compatibility is enabled for the given component.
 *
 * @date    20/1/15
 * @since   5.1.5
 *
 * @param   string $name The name of the component to check.
 * @return  bool
 */
function acf_get_compatibility( $name ) {
	return apply_filters( &quot;acf/compatibility/{$name}&quot;, false );
}
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