php - 我想保存结果以使用 enter 循环

Question

我想用这段代码保存回车循环的结果

$str = '';
for( $i = 1; $i <= 10; $i++ ) {
    $str .= $i;    
}

$myfile = fopen("newfile.txt", "w") or die("Unable to open file!");
$txt = $str . "\n";
fwrite($myfile, $txt);
fclose($myfile);

但是结果是

12345678910

我想要的结果是这样的

1
2
3
4
5
6
7
8
9
10

然后我尝试使用这个脚本

$str = '';
for( $i = 1; $i <= 10; $i++ ) {
    $str .= $i . "<br>";    
}

$myfile = fopen("newfile.txt", "w") or die("Unable to open file!");
$txt = $str . "\n";
fwrite($myfile, $txt);
fclose($myfile);

这样的结果

1<br>2<br>3<br>4<br>5<br>6<br>7<br>8<br>9<br>10<br>

谁能帮我修复这个脚本？

Answer 1

您可能只想直接在循环中添加换行符来获得您想要的内容，如下所示:

    <?php
        $str = '';
        for( $i = 1; $i <= 10; $i++ ) {
            $str .= $i . PHP_EOL;   //<== ADD A NEW LINE AT THE END OF EACH DIGIT 
        }

        $myfile = fopen("newfile.txt", "w") or die("Unable to open file!");
        //$txt  = $str . "\n";  //<== YOU WOULDN'T NEED THIS LINE ANYMORE
        fwrite($myfile, $str);
        fclose($myfile);