Php 查找包含各种html标记的字符串

当我试图通过AK-47黑色层压板（工厂新产品）的价格和预匹配进行循环时，我遇到了以下问题：它似乎没有找到它

我使用了以下代码

{
  "status" : "success",
  "prices" : [
    {
      "market_hash_name" : "AK-47 | Aquamarine Revenge (Battle-Scarred)",
      "price" : "9.77",
      "created_at" : 1463806291
    },
    {
      "market_hash_name" : "AK-47 | Aquamarine Revenge (Factory New)",
      "price" : "38.51",
      "created_at" : 1463822081
    },
    {
      "market_hash_name" : "AK-47 | Aquamarine Revenge (Field-Tested)",
      "price" : "17.8",
      "created_at" : 1463811694
    },
    {
      "market_hash_name" : "AK-47 | Aquamarine Revenge (Minimal Wear)",
      "price" : "26.0",
      "created_at" : 1463823062
    },
    {
      "market_hash_name" : "AK-47 | Aquamarine Revenge (Well-Worn)",
      "price" : "12.9",
      "created_at" : 1463832713
    },
    {
      "market_hash_name" : "AK-47 | Black Laminate (Battle-Scarred)",
      "price" : "6.36",
      "created_at" : 1463832092
    },
    {
      "market_hash_name" : "AK-47 | Black Laminate (Factory New)",
      "price" : "93.0",
      "created_at" : 1463800517
    },
    ]
}

$data=json\u decode（$json，true）；
$prices=$data['prices']；
回声'；
$item='AK-47 |黑色层压板（工厂新）'；
foreach（价格为$items）{
foreach（$key=>$value的项目）{
如果（预匹配（“/”$item./i“，$value））{
回声$key.“
”；
回声$value.“
”；
}
}
}
回声'；

你知道我做错了什么吗

---

如果您有任何帮助，我们将不胜感激。问题在正则表达式模式中，

|

和

（）

是正则表达式字符

你可以用

试一试

反而

if(preg_match("/".$item."/i",$value )){

您还可以尝试将正则表达式更改为：

$item = 'AK-47 \| Black Laminate \(Factory New\)';

---

使用

preg_quote

函数对正则表达式模式中使用的字符串中的特殊字符进行转义：

$data = json_decode($json,true);
$prices = $data['prices'];

$item = 'AK-47 | Black Laminate (Factory New)';
foreach ($prices as $items ){
    foreach ($items as $key => $value){
        if (preg_match("/". preg_quote($item) ."/i", $value )) {
            echo $key."<br>";
            echo $value."<br>";
        }
    }
}

---

有没有办法通过编程将这些/添加到变量$item中？@user3280648是使用

preg\u quote

$item = 'AK-47 \| Black Laminate \(Factory New\)';

$data = json_decode($json,true);
$prices = $data['prices'];

$item = 'AK-47 | Black Laminate (Factory New)';
foreach ($prices as $items ){
    foreach ($items as $key => $value){
        if (preg_match("/". preg_quote($item) ."/i", $value )) {
            echo $key."<br>";
            echo $value."<br>";
        }
    }
}

market_hash_name
AK-47 | Black Laminate (Factory New)