无法删除项目符号'•'；使用php

我正在尝试从mysql读取数据，mysql有以下数据

<b>Network Security, Router / Firewall</b>

• We have a minimum, sophisticated firewalls which has been deployed at all external connections (Example: Internet)

我得到以下结果：

Network Security, Router / Firewall � We have a minimum, sophisticated firewalls which has been deployed at all external connections (Example: Internet)    

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请帮我把不需要的东西拿走�

请确保源文本中的项目符号是实际的项目符号，它可能是一些Unicode字符，例如

● 黑圈25CF ⚫ 中黑色圆圈26AB

运行下面的代码，您可以添加更多字符以在$search数组列表中查找，并在$replace数组中添加值以替换

$message = "• We have a minimum, sophisticated firewalls which has been deployed at all external connections (Example: Internet)";

$search = array(chr(145),chr(146),chr(147),chr(148),chr(151), "•");

$replace = array("'","'",'"','"','-', "");
$message=str_replace($search, $replace, $message);
echo $message;

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可能重复：添加标题（“内容类型：text/html；charset=utf-8”）；并没有帮助meLets解决第一个问题。我无法复制不可回显的字符串，.@3v4l.org/V5nTb如果我使用htmlentities（）将出现空白。我看不到任何这样的文字time@srikantamondal空白处，请使用带有

@

的用户名，以便发送通知。

$message = "• We have a minimum, sophisticated firewalls which has been deployed at all external connections (Example: Internet)";

$search = array(chr(145),chr(146),chr(147),chr(148),chr(151), "•");

$replace = array("'","'",'"','"','-', "");
$message=str_replace($search, $replace, $message);
echo $message;