szbl · September 6, 2017 22:28
diff --git a/usort-example.php b/usort-example.php
 <?php
 function subval_sort( $a, $b )
 {
    if ( $a['date'] == $b['date'] )
        return 0;
    return $a['date'] < $b['date'] ? -1 : 1
 }

 usort( $post_data, 'subval_sort' );
	<?php
	function subval_sort( $a, $b )
	{
	if ( $a['date'] == $b['date'] )
	return 0;
	return $a['date'] < $b['date'] ? -1 : 1
	}

	usort( $post_data, 'subval_sort' );