Php foreach

 <?php
 $a = [2, 5, 2, 3, 5];
 foreach ($a as $v) {
 echo $v . "<br/>";
 }
 $a[7]=9;
 $a['juan']='pablo';
 foreach ($a as $clave=>$valor) {
 echo $clave." - ".$valor . "<br/>";
 }
 for($i=0;$i<count($a);$i++){
 echo $a[$i] . "<br/>";
 }
 ?>