Arrays

array filter by interval

Type:	code fragment
Added by:	alex_vlad
Entered:	15/12/2004
Last modified:	01/12/2004
Rating:	- (fewer than 3 votes)
Views:	3309

this function return array B from array A by N interval Since i element

<?php
 function filter_by_interval($a,$i,$interval)

                            {

                                $count = count($a);

                                

                                for( $i = $i - 1; $i < $count; $i++ ) {

                                

                                    $ar[] = $a[$i];

                                    $i+=$interval;

                                  

                                }

                                return $ar;

                            }
 ?>

Usage Example

<?php

                            $a = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);

                            

                            
 $ar = filter_by_interval($a,5,2);

                            

                            for( $i = 0; $i < count($ar); $i++ )

                            echo $ar[$i]."<br>";
 ?>

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