[PHP_Day 5]_基本語法part5_迴圈while

[PHP_Day 5]_基本語法part5_迴圈while_do..while

- 7月 19, 2020

PHP迴圈

while

<?php
 $count = 5;
 while($count !=0){
  echo "<h1>My Test</h1>";
  echo "Count: ".$count."<br/>";
  $count--;
 }
 
 
?>

Array遍歷(倒序)

<?php
 $arr = ["blue","green","yello","white"];
 $count = count($arr);
 echo $count."<br/>";
 while($count--){
  echo $arr[$count]."<br/>";
 }
 
 
?>

Array遍歷(正序)

<?php
 $arr = ["blue","green","yello","white"];
 $count = count($arr);
 $idx = 0;
 echo $count."<br/>";
 while($count--){
  echo $arr[$idx]."<br/>";
  $idx++;
 }
 
 
?>

do ... while

do裡面會先做 while裡面要改成先減減不然會offset

<?php
 $arr = ["blue","green","yello","white"];
 $count = count($arr);
 $idx = 0;
 echo $count."<br/>";
 
 do{
  echo $arr[$idx]."<br/>";
  $idx++;
 }while(--$count)
?>

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[PHP_Day 5]_基本語法part5_迴圈while_do..while

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