PHP&;while外while循环的输出
我的Php代码是PHP&;while外while循环的输出,php,mysql,while-loop,trim,Php,Mysql,While Loop,Trim,我的Php代码是 <?php include('session.php'); include('db.php'); $session=$_SESSION['agent']; $home1 = "SELECT fullname FROM users WHERE role='$session'"; $result1=mysql_query($home1) or die(mysql_error()); while ($row1=mysql_fetch_array($result1)) {
<?php
include('session.php');
include('db.php');
$session=$_SESSION['agent'];
$home1 = "SELECT fullname FROM users WHERE role='$session'";
$result1=mysql_query($home1) or die(mysql_error());
while ($row1=mysql_fetch_array($result1)) {
echo $gallery = "'".$row1[0]."',"; // output is 'sam','teja','multiplevaluessoon',
$home = "SELECT * FROM chat WHERE chat.from IN ('$gallery')";
}
$result=mysql_query($home) or die(mysql_error());
while ($row=mysql_fetch_array($result)) {
$msg =$row["message"];
echo $randomUserId=$row["from"];
echo $msg . "<br/>";
}
?>
我得到的循环中的最后一个字符
'sam''teja''multiplevaluessoon'
这是由于while循环而修剪所有逗号,我需要修剪最后一个逗号,以便在where子句中执行它
请向我推荐任何可以利用的想法
像这样更改您的
while ($row1=mysql_fetch_array($result1)) {
$gallery .= "'".$row1[0]."',";
$home = "SELECT * FROM chat WHERE chat.from IN ('$gallery')";
}
echo rtrim($gallery,',');
删除逗号,如下所示
$gallery=substr_replace($gallery ,'',0,1);
这就是我在那里解释的,当我修剪时,它删除了所有逗号,因为它在while循环中。您需要在while循环之外执行此操作。。这就是为什么我将变量名设置为$yourfinaltext
,但在循环外部,我不会得到与循环内部相同的输出,在循环外部,它只会打印列的最后一个值
while ($row1=mysql_fetch_array($result1)) {
$gallery .= "'".$row1[0]."',";
$home = "SELECT * FROM chat WHERE chat.from IN ('$gallery')";
}
echo rtrim($gallery,',');
$gallery=substr_replace($gallery ,'',0,1);
$rest = substr("abcdef", 0, -1); // returns "abcde"