数组中的两种方式有什么不同？

Question

<?php
//I have an array like this
$ar = array('0', '1', '2', '3', '4', '5');

for($i = 0; $i < count($ar); $i++)
{
echo $ar[$i+1]; //way1
echo $ar[$i] +=1 //way2
}

?>

So is it different between way1 and way 2 because i saw the same result ???

Answer 1

Please clarify what exactly you're looking for here.

These two are totally different approaches and give you different results when your array values are something else.

echo $ar[$i+1];  // Means you're printing the values corresponding to array keys 1, 2, 3.....

echo $ar[$i] +=1 // Means you're getting the values of keys 0, 1, 2... and adding 1 to each of the values.

If you have an array $ar = array(3, 6, 2, 10), these two will work this way:

echo $ar[$i+1]; // 6, 2, 10 ....

echo $ar[$i] +=1 // 4, 7, 3, 11....

Hope this helps.

Peace! xD