Question

如何解决此问题的原始数组是

Array ( [1] => 50 [ 2] => 100 [ 3] => 150 [ 4] => 175 [ 5] => 200 [ 6] => 225 [ 7] => 250 )

代码：

<?php
    $myfile = fopen("bin\PriceDays.txt", "r") or die("Unable to open file!");
    $string = fread($myfile,filesize("bin\PriceDays.txt"));
    //string to array
    $a = explode(',', $string);

    foreach ($a as $result) {
        $b = explode('. ', $result);
        $PriceDays[$b[0]] = $b[1];
    }

    print_r($PriceDays);
    echo $PriceDays[2];




    fclose($myfile);

？>

Answer 1

问题是输入中,后面有一个空格，因此$b[0]将以空格开头。使用trim()删除周围的空白。

foreach ($a as $result) {
    $b = explode('. ', $result);
    $PriceDays[trim($b[0])] = trim($b[1]);
}

注意：未定义的偏移量：第20行的C：\ xampp \ htdocs \ test.php中的2如何解决

1 个答案: