[英]PHP Can not import a global variable into a function that is inside a class
I've a unlimited menu class based on php and mysql that found on stackoverflow. 我有一个基于php和mysql的无限菜单类,可在stackoverflow上找到。 I've customized it for multilanguage web page.
我已经为多语言网页定制了它。 But when i'm trying to import a global variable into class, itgives me a warning;
但是,当我尝试将全局变量导入类时,会给我一个警告。
Warning: Invalid argument supplied for foreach() in C:\\wamp\\www\\path\\menu.php on line 75
警告:第75行的C:\\ wamp \\ www \\ path \\ menu.php中为foreach()提供了无效的参数
This is Sql query and get_menu_items
function: 这是Sql查询和
get_menu_items
函数:
function get_menu_items()
{
global $lang;
global $visibility;
$sql = 'SELECT menu. * , menu_lang. *
FROM menu
INNER JOIN menu_lang
ON menu.id = menu_lang.menu_id
AND menu_lang.menu_lang_iso = '.$lang.'
AND menu_lang.visibility = '.$visibility.'';
return $this->fetch_assoc_all( $sql );
}
And $lang
variable coming from lang.php file. $lang
变量来自lang.php文件。 It looks like; 看起来像;
<?php
ob_start();
session_start();
header('Cache-control: private');
if(isset($_GET["lang"])) {
$lang = $_GET["lang"];
$_SESSION["lang"] = $lang;
setcookie("lang", $lang, time() + (3600 * 24 * 30));
}
elseif(isset($_SESSION["lang"])) {
$lang = $_SESSION["lang"];
}
elseif(isset($_COOKIE["lang"])) {
$lang = $_COOKIE["lang"];
}
else {
$lang = "tr";
$_SESSION["lang"] = $lang;
setcookie("lang", $lang, time() + (3600 * 24 * 30));
}
ob_end_flush();
i signed warning line 75 TH LINE
, you can find it below; 我在警告行
75 TH LINE
签名,可以在下面找到它;
function get_menu_html( $root_id = 0 )
{
$this->html = array();
$this->items = $this->get_menu_items();
foreach ( $this->items as $item )
$children[$item['parent_id']][] = $item; // 75. LINE HERE
$loop = !empty( $children[$root_id] );
....
If i change sql query without variables manuel values it works perfectly; 如果我更改无变量manuel值的sql查询,它会完美工作;
$sql = 'SELECT menu. * , menu_lang. *
FROM menu
INNER JOIN menu_lang
ON menu.id = menu_lang.menu_id
AND menu_lang.menu_lang_iso = "tr"
AND menu_lang.visibility = '.$visibility.'';
What am i missing? 我想念什么? Does my language script cant handle last else statement, or my
get_menu_items
function cant import $lang
variable? 我的语言脚本不能处理last else语句,还是我的
get_menu_items
函数不能导入$lang
变量?
Any help will greatly appricated. 任何帮助将不胜感激。
old school error of string concatenation of quotes '
引号的字符串连接的老同学错误
'
$sql = "SELECT menu. * , menu_lang. *
FROM menu
INNER JOIN menu_lang
ON menu.id = menu_lang.menu_id
AND menu_lang.menu_lang_iso = '".$lang."'
AND menu_lang.visibility = '".$visibility."'";
what it does 它能做什么
this particular section : '".$lang."'
will make sure that variable being fetched in query, is quoted with '
quotes around it! 这个特定的部分:
'".$lang."'
将确保在查询中获取的变量用'
引号引起来!
Also, upgrade to better and secure way of doing things 另外,升级到更好,更安全的工作方式
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