Question

我想改变保存到db的字符串的方向。我希望HELLO这个词看起来像这样：

    H W
    E O
    L R
    L L
    O D

我试试这个，但给我看问号？：

echo "<table>";

$res=$functions->query("SELECT string1 FROM table");

while ($row = mysql_fetch_assoc($res)){
    $hor=str_split($row['string1']);
    foreach ($hor as $letter) {
         $vert=$letter."\n";        
    }
    echo"<th>".$vert."</th>";   
}

// other functions... 

echo "</table>";

Answer 1

您应该使用以下代码更改您的foreach语句：

foreach($hor as $letter) {
    $vert .= $letter . "\n";
}

您忘记了显示所有信件所必需的concatenating问题。

Answer 2

你需要附加到$ vert，否则你会继续覆盖并只获得最后一个值

foreach ($hor as $letter) {
  $vert=$vert.$letter."\n";        
}

DEMO

Answer 3

多田！试试这个，解释在代码中的注释中：

$str = "HELLO HOW YA DOING WORLD?";

// Convert $str to an array of rows of letters.
$strWords          = explode(' ', $str);
$strLettersRowsArr = array_map('mb_split', $strWords);

// Get maximium number of rows of letters e.g. `strlen("WORLD?")` => `6`.
$maxRows = 0;
foreach ($strLettersRowsArr as $lettersArr) {
    if (count($lettersArr) > $maxRows) {
        $maxRows = count($lettersArr);
    }
}

// Pad out the elements of $strLettersRowsArr with spaces that aren't as long as the longest word.
// e.g.
// from:
// [
//     ['H', 'e', 'l', 'l', 'o'],
//     ['d', 'u', 'd', 'e'],
// ]
// to:
// [
//     ['H', 'e', 'l', 'l', 'o'],
//     ['d', 'u', 'd', 'e', ' '],
// ]
foreach ($strLettersRowsArr as $key => &$lettersArr) {
    while (count($lettersArr) < $maxRows) {
        $lettersArr[] = ' ';
    }
}
unset($lettersArr);

// Get the columns of letters.
// e.g.
// from:
// [
//     ['H', 'e', 'l', 'l', 'o'],
//     ['w', 'o', 'r', 'l', 'd'],
// ]
// to:
// [
//     ['H', 'w'],
//     ['e', 'o'],
//     ['l', 'r'],
//     ['l', 'l'],
//     ['o', 'd'],
// ]
$strLettersColumnsArr = [];
for ($row = 0; $row < $maxRows; $row++) {
    $strLettersColumnsArr[] = array_column($strLettersRowsArr, $row);
}

// Print out letter columns.
foreach ($strLettersColumnsArr as $lettersColumnArr) {
    foreach ($lettersColumnArr as $letter) {
        echo "$letter ";
    }
    echo "\n";
}

输出：

H H Y D W 
E O A O O 
L W   I R 
L     N L 
O     G D 
        ?

字符串的垂直方向为mysql

3 个答案: