php - How to remove last comma from each array in foreach? -

i have multidimensional array , trying put comma delimiter , remove last comma each array far try this.

$cars=array("volvo","bmw","toyota","honda","mercedes"); $chunks =(array_chunk($cars,2)); foreach ($chunks $key) {     echo "<ul>";     $data = array();     foreach ($key $value) {         $data[] ="<li>".$value."</li>".",";     }     rtrim($data, ",");     echo "</ul>"; } foreach ($data $key ) {     echo $key; } 

expected output:

<ul>     <li>volvo,</li><li>bmw</li> </ul> <ul>     <li>toyota,</li><li>honda</li> </ul> <ul>     <li>mercedes</li> </ul> 

notice there no comma after bmw, honda, or mercedes.

here less-loopy method uses array_splice() instead of array_chunk(). no count() calls, no incrementing counters, 1 loop.

code: (demo)

$cars=array( "volvo","bmw","toyota","honda","mercedes"); while($cars){                             // while there still elements in array...     $chunk=array_splice($cars,0,2);       // extract first 2 elements (reducing $cars)     if(isset($chunk[1])){$chunk[0].=',';} // add comma 1st element if 2nd element exists     $output[]=$chunk;                     // add extracted elements multi-dim output } var_export($output); 

output:

array (   0 =>    array (     0 => 'volvo,',     1 => 'bmw',   ),   1 =>    array (     0 => 'toyota,',     1 => 'honda',   ),   2 =>    array (     0 => 'mercedes',   ), ) 

---

the implementation unordered list simpler -- add comma joining string </li><li> in implode() call: ,</li><li>. improved code versatility larger "chunks". (whereas first code suited subarrays 2 elements.)

code: (demo)

$cars=array( "volvo","bmw","toyota","honda","mercedes"); while($cars){     $chunk=array_splice($cars,0,2);     echo "<ul><li>",implode(",</li><li>",$chunk),"</li></ul>";  // add comma implode's glue string } 

output:

<ul>     <li>volvo,</li><li>bmw</li> </ul> <ul>     <li>toyota,</li><li>honda</li> </ul> <ul>     <li>mercedes</li> </ul>