Question

How to put IF THEN expression in PHP function fwrite? The below-given code does not work correctly. Please look at the line fwrite($fh, "$row[0]...).

    $myFile = "testFile.php";
    $fh = fopen($myFile,  w ) or die("can t open file");

    fwrite($fh, "lat    lon title   description iconOffset  icon
");
    foreach ($result4 as $row):
        fwrite($fh, "$row[0]    $row[1] $row[2] Resource average speed is: $row[3] km/h -10,-10 if($row[4]==0) images/markerRed.png else images/markerGreen.png
");
    endforeach;

    fclose($fh);
?>

Answer 1

$image = ($row[4] == 0) ? "images/markerRed.png" : "images/markerGreen.png";
/* ... $row[3] ... ".$image."
"; */

Answer 2

尝试此 :

foreach ($result4 as $row) 
{
    $s = "$row[0]    $row[1] $row[2] Resource average speed is: $row[3] km/h -10,-10 ";
    $s .= $row[4]==0 ?  images/markerRed.png  :  images/markerGreen.png ;
    fwrite($fh, $s."
");
}

Answer 3

fwrite 无法理解或评价 PHP 逻辑。将以下的 if 语句分隔开来 :

fwrite($fh, "$row[0]    $row[1] $row[2] Resource average speed is: $row[3] km/h -10,-10");
if($row[4]==0)
    fwrite($fh, " images/markerRed.png
");
else
    fwrite($fh, " images/markerGreen.png
");

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