<?php
 
    $array1 = array(
    	"a",
    	"b",
    	"c",
    	"------------empty",
    	"d",
    	"e",
    	"------------empty",
    	"f",
    	"------------empty"
    );    
 
    echo "Array 1 before change \n\n";
    print_r($array1);
 
    $array2 = array(
    	"xxx",
    	"yyy",
    	"zzz"
    );
 
    echo "\n\nArray 2 \n\n";
    print_r($array2);
 
    $size1 = count($array1);
    $size2 = count($array2);
    $i = 0;
    $j = 0;
    while($i < $size1) {
    	if($array1[$i] == "------------empty" && $j < $size2) {
    		$array1[$i] = $array2[$j];
    		$j = $j + 1;
    	}
    	$i = $i + 1;
    }
 
    echo "\n\nArray 1 after change\n\n";
    print_r($array1);
 
?>

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