在字符串内部搜索时，Array_search返回false - Array_search returns false when searching inside strings

Array_search returns false when searching inside strings

这是代码

$description = explode("<li>", $rows['description']);
var_dump($description);
$find = 'annual';
$key = array_search($find, $description);
var_dump($key);
//echo $description[$key];

这是输出：

array(9) { 
    [0]=> string(4) "   " 
    [1]=> string(185) "Fair. No annual fee. No overlimit fee. No foreign transaction fee. Pay up to midnight ET online or by phone on your due date without a fee. Plus, paying late won't raise your APR.*" 
    [2]=> string(183) "Generous. 5% cash back at Home Improvement Stores & More on up to $1,500 in purchases from April through June 2014 when you sign up. And 1% cash back on all other purchases.*" 
    [3]=> string(64) "Human. 100% U.S.-based customer service available any time." 
    [4]=> string(188) "Looks out for you-since each Discover purchase is monitored. If it's unusual, you're alerted by e-mail, phone or text-and never responsible for unauthorized Discover card purchases.*" 
    [5]=> string(106) "Plus, free FICO® Credit Score on your monthly statement to help you stay on top of your credit.*" 
    [6]=> string(171) "0% Intro APR* on balance transfers for 18 months. Then the variable purchase APR applies, currently 10.99% - 22.99%. A fee of 3% applies for each balance transferred." 
    [7]=> string(112) "0% Intro APR* on purchases for 6 months. Then the variable purchase APR applies, currently 10.99% - 22.99%." 
    [8]=> string(119) "*Click "Apply" to see rates, rewards, and free FICO® Credit Score terms and other information.
" } 
bool(false)

变量$find正在输出中搜索"annual"，您可以看到数组键1中有year，但它返回false。

所以我不知道我错过了什么或做错了什么。我试着用数组1的整个值来测试它，以确保在数组内部搜索没有问题，仍然是错误的。也更改了$find = "Generous"相同的结果。。。错误

您误解了array_search()的功能。以下行：

公平。无年费。无超限额费用。不收取国外交易费用。在线或在预产期通过电话支付至美国东部时间午夜，不收取任何费用。此外，延迟付款不会提高您的APR*

包含字符串annual，但它不是完整的字符串annual。换句话说，array_string()不在字符串内部搜索，而是尝试完全匹配。

为了找到你正在寻找的结果，我会尝试以下内容：

$matches = array_filter($description, function($el) {
    // evaluate the current element
    // return true if a string index is 
    // found for the target string
    return strpos($el, 'annual') !== false;
});
var_dump($matches);

这对$description数组进行迭代，并返回一个数组$filtered，该数组包含包含字符串annual的任何元素。或者，您可以使用foreach循环，并将每个匹配的示例添加到$matches数组中。

此处的示例：https://eval.in/146145

希望这能有所帮助。

http://ie1.php.net/strpos
http://www.php.net/manual/en/function.array-filter.php