php关联数组，preg_match和循环

Question

我有一个关联数组，我用正则表达式从中提取两个数字

<?php           
 $link = array (
 "model_one" => "Only 50.95 usd for 2 years or 700.30 usd.",
 "model_two" => "Only 70.95 usd for 2 years or 900.20 usd.");
 foreach ($link as $key=>$links) {
    $pattern = '/.\d+(?:\.\d{2})?((?<=[0-9])(?= usd))/';
    preg_match_all($pattern,$links,$result);
    $final = array();
    foreach($result[0] as $k=>$v) {
    $final[]=$v;
    echo $final[0]; // print 50.95 50.95 70.95 70.95    
    }
 }
?>

我无法检索与键关联的每个数字

例子：

model_one 50.95
model_one 700.30
model_two 70.95
model_two 900.20

Answer 1

你需要遍历包含匹配值的数组：

foreach ($link as $key => $links) {
    $pattern = '/\d+(?:\.\d{2})?((?<=[0-9])(?= usd))/';
    preg_match_all($pattern,$links,$result);

    foreach ($result[0] as $amt) {
        echo "$key $amt\n";
    }
}

请注意，我还删除了正则表达式开头的句点字符 (.)。它将匹配任何不是空格的字符。这将导致捕获在开头包含一个空格。

输出：

model_one 50.95
model_one 700.30
model_two 70.95
model_two 900.20

Demo