php - 如何为网站访问者打印 0000000 值

Question

我在 php 中使用网站计数器，我只需要显示从 0000000 值开始的计数器。

下面是我的代码:

<?php
//opens countlog.txt to read the number of hits

    $datei = fopen("countlog.txt","r");
    $count = fgets($datei,1000);
    fclose($datei);
    $count=$count + 1 ;
    // get the total number of digits in the counter
    $number_length = strlen($count);
    $main_image = "";
    for($i=0;$i<$number_length;$i++){
        $digit = substr($count, $i, 1);
        if($digit == 1){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/1.png'>";
        }
        if($digit == 2){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/2.png'>";
        }
        if($digit == 3){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/3.png'>";
        }
        if($digit == 4){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/4.png'>";
        }
        if($digit == 5){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/5.png'>";
        }
        if($digit == 6){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/6.png'>";
        }
        if($digit == 7){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/7.png'>";
        }
        if($digit == 8){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/8.png'>";
        }
        if($digit == 9){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/9.png'>";
        }`enter code here`
        if($digit == 0){
            $main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/0.png'>";
        }
    }
    echo $main_image;
    // opens countlog.txt to change new hit number
    $datei = fopen("countlog.txt","w");
    fwrite($datei, $count);
    fclose($datei);

?>

Answer 1

试试 str_pad 函数:

$count=$count + 1 ;
$count = str_pad($count, 7, '0', STR_PAD_LEFT);

你也可以用一行替换你的大if block :

$main_image .= "<img height='32' width='19' src='".SITE_URL."images/digit/".$digit.".png'>";