WordPress: Merge array edits made by a given user.

function-merge-user-edits.php

/**
 * function merge_user_edits()
 *
 * Merge the user edits to the existing meta data:
 * 
 * @author  birgire
 * @version 0.0.1
 * @param  integer $user_id
 * @param  array   $data
 * @param  array   $edits
 * @param  string  $key
 * @return array   $new
 * 
 */
 
function merge_user_edits( $user_id = 0, $data = array(), $edits = array(), $key = '' )
{
    $count_data  = count( $data );
    $count_edits = count( $edits );

    $tmp = array();
    $new = array();
	
    if( $user_id > 0 && $count_edits > 0 && $count_data > 0 )
    {
        for ( $i = 0; $i < $count_data; $i++ )
	{
    	    if( isset( $data[$i][$key] ) && $user_id == $data[$i][$key] )
	    {
	        $tmp[] = $data[$i];
	    }
	}
	$new = $edits + $tmp;
	$new = array_slice( $new, 0, count( $edits ) );
    }	
    return $new;
}

merge-array-edits-demo.php

/**
 * Usage examples for the merge_user_edits() function
 *
 * @author  birgire
 * @version 0.0.1
 */

//----------------------------------------
// All meta data:
//----------------------------------------
$data = array(
	array( 
		'figuresugsubjectfrom' 		=> '1', 
		'figuresugsubjectposition' 	=> 'CEO', 
		'figuresugsubjectworkplace'     => 'Office 1',
		'figuresugsubjectlocation' 	=> 'London',
		'figuresugsubjectstatus'  	=> 'on',
	),
	array( 
		'figuresugsubjectfrom' 		=> '2', 
		'figuresugsubjectposition' 	=> 'CTO', 
		'figuresugsubjectworkplace'     => 'Office 2',
		'figuresugsubjectlocation' 	=> 'Paris',
		'figuresugsubjectstatus'  	=> 'on',
	),
	array( 
		'figuresugsubjectfrom' 		=> '1', 
		'figuresugsubjectposition' 	=> 'Manager', 
		'figuresugsubjectworkplace'     => 'Office 3',
		'figuresugsubjectlocation' 	=> 'Reykjavik',
		'figuresugsubjectstatus'  	=> 'on',
	),
);

//----------------------------------------
// Edits #1 from user with user_id = 1. 
// Two rows with edit + One new row:
//----------------------------------------
$edits_1 = array(
	array( // Edit row:
		'figuresugsubjectfrom' 		=> '1', 
		'figuresugsubjectposition' 	=> 'CEO', 
		'figuresugsubjectworkplace'     => 'Office 1b',
		'figuresugsubjectlocation' 	=> 'London',
		'figuresugsubjectstatus'  	=> 'on',
	),
	array( // Edit row:
		'figuresugsubjectfrom' 		=> '1', 
		'figuresugsubjectposition' 	=> 'Manager', 
		'figuresugsubjectworkplace'     => 'Office 3a',
		'figuresugsubjectlocation' 	=> 'Reykjavik',
		'figuresugsubjectstatus'  	=> 'on',
	),
	array( // New row:
		'figuresugsubjectfrom' 		=> '1', 
		'figuresugsubjectposition' 	=> 'Sales', 
		'figuresugsubjectworkplace'     => 'Office 10',
		'figuresugsubjectlocation' 	=> 'Sydney',
		'figuresugsubjectstatus'  	=> 'off',
	),
);


//----------------------------------------
// Edits #2 from user with user_id = 1.
// One row with edit + One deleted row:
//----------------------------------------
$edits_2 = array(
	array( // Edit row:
		'figuresugsubjectfrom' 		=> '1', 
		'figuresugsubjectposition' 	=> 'CEO', 
		'figuresugsubjectworkplace'     => 'Office 1c',
		'figuresugsubjectlocation' 	=> 'London',
		'figuresugsubjectstatus'  	=> 'on',
	),
);


//----------------------------------------
// Merged results:
//----------------------------------------

// Example #1
$merge = merge_user_edits( $user_id = 1, $data, $edits_1, 'figuresugsubjectfrom' );
print_r( $merge );

// Example #2
$merge = merge_user_edits( $user_id = 1, $data, $edits_2, 'figuresugsubjectfrom' );
print_r( $merge );