Question

  $rows = mysql_num_rows($result) ;
  for ($j=0 ; $j < 3 ; $j++) {
  for ($i=0 ; $i < 3 ; $i++) {
    $row = mysql_fetch_array($result) ;
    echo  <a href="image2.php?id= .$row[ ID ]. "> ."<img src= ".$row[ Image ]."  />". </a>  ;

  }
   echo "
";
  }

The code displays three groups of three images. My understanding was that and (double quotes) should create a new line. However it is just inserting a space between the images. Is the way am callign wrong or is it am using the wrong code to isneert a new line (line break)

实例(图1):

Without echo : ######### With echo : ### ### ###

Answer 1

Your echo " "; is outside the loop. Move it inside the loop.

而且,如果你希望浏览器能看到线上的差异,你也应印刷<条码>和代号;。

  $rows = mysql_num_rows($result) ;
  for ($j=0 ; $j < 3 ; $j++) {
  for ($i=0 ; $i < 3 ; $i++) {
    $row = mysql_fetch_array($result) ;
    echo  <a href="image2.php?id= .$row[ ID ]. "> ."<img src= ".$row[ Image ]."  />". </a>  ;
  }
    echo "<br />
";    
  }

Answer 2

Whitespace is not displayed verbatim when it s part of HTML text. and are not universal constants; they are just characters, and it s up to whatever program consumes them to decide what to do with them.

您应使用<br>。

Answer 3

You need:

echo  <br /> ;

而不是:

echo "
";

Answer 4

You can also consider setting a proper header Exmaple:


$data = [
    [1,2,3],
    [4,5,6],
    [7,8,9]
];
header("Content-Type: text/plain");
foreach($data as $row){
    echo implode( , , $row) . "
";
}

友情链接