在PHP中循环For (add, into array) - Looping For in PHP (add , into array)

Looping For in PHP (add , into array)

本文关键字：into array add PHP 循环 For | 更新日期: 2023-09-27

这是我的代码:

$query = mysql_query("SELECT * FROM `member` ORDER BY Code");
$fieldNum = mysql_num_fields($query);
for($q=0; $q<$fieldNum; $q++){
    $value = "'value$q'";
    echo "$value";
    echo ",";
}

我想要输出
value0,value1,value2, ... ,value5
但是我得到了输出
value0,value1,value2, ... ,value5,

我想删除最后一个逗号，我该怎么做?

简单方法

$value = array();
for($q=0;$q<$fieldNum;$q++){
        $value [] = 'value'.$q;
      }
echo implode (',', $value);

http://php.net/manual/en/function.implode.php

一种可能性:

for($q=0; $q<$fieldNum; $q++){
    $value = "'value$q'";
    echo "$value";
    if ($q != $fieldNum - 1) echo ",";
}

for($q=0;$q<$fieldNum;$q++){
    $value = "'value$q'";
    echo "$value";
    if($q==$fieldNum-1){
     echo "";
    }else{
        echo ",";
    }
}

remove echo "，"而不是使用:

if ($q=0)
    echo "$value";   
else
    echo ",$value";

现在你有a，在开始，然后总是a，在你的值之前，所以它永远不会以a结束，

按以下步骤操作

for($q=0;$q<;$q++){
  $value = "'value$q'";
  echo "$value";
  if($q < $fieldNum-1) {
    echo ",";
  }
}