<?php $data = array('a'=>1,'b'=>2,'c'=>3,'d'=>4,'e'=>5); $key = 'd'; if( array_key_exists( $key, $data )): $pos = array_search( array_keys( $key, $data ) ); $start = array_slice( $data, 0, $pos ); $end = array_slice( $data, $pos, count( $data ) ); $data = array_merge( $start, array( null ), $end ); endif; var_dump( $data );
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