php - 尝试在按字母顺序排序的列表中添加分隔符第一个字母会改变

Question

我按字母顺序对列表和数据库mysql中的数据进行了排序。要读取我正在使用foreach循环的数据。现在，我希望当第一个字母（a->b->c）发生变化时，将在“A”字符列表之后添加一个分隔符等等。

代码：

$result = mysqli_query($con,"SELECT * FROM pages order by name ASC"); 
foreach($result as $val){ 
   echo $val['name']."<br>"; echo "<hr></hr>"; 
} 

提前致谢

Answer 1

试试这个（未经测试的代码）：

$firstLetter = 'A';
foreach( $result as $val ) { 
  $ch = substr( $val['name'],1,1);
  if( $ch != $firstLetter ) {
    echo "<hr>";
    $firstLetter = $ch;
  }
  echo $val['name']."<br>";
}

Answer 2

尝试这个：

$result = mysqli_query($con,"SELECT * FROM pages order by name ASC"); 

$lastChar = "?"; //initialization

foreach($result as $val){ 
   if($lastChar != $val['name'][0]){    
     echo $val['name'][0].'<BR>';       //separator
   }
   echo $val['name']."<br>"; echo "<hr></hr>";
   $lastChar = $val['name'][0];         //update
}  

Answer 3

<?php
$first = '';
$result = mysqli_query($con,"SELECT * FROM pages order by name ASC"); 
foreach($result as $val){

    $first = substr($val['name'], 0, 1);

    if ($first != $prev){
        echo '<h1>'.$first.'</h1>';
    }

    echo $val['name']."<br>";

    $prev = $first;
} 

Answer 4

$char = 'a';
foreach($result as $val) {
  $newChar = substr($val['name'],0,1);
  if ($newChar != $char) {
    $char = $newChar;
    echo "seperator for new character";
  }
  //do your other stuff
}

这是你想做的吗？