我有以下带有jQuery的HTML：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Test</title>
<script type="text/javascript" src="../scripts/jquery-2.1.4.min.js"></script>
<link href="../scripts/ui/jquery-ui.min.css" rel="stylesheet" type="text/css">
<script type="text/javascript" src="../scripts/ui/jquery-ui.min.js"></script>
<script type="text/javascript">
$(function() {
$("#acInput").autocomplete({
source: "autocomplete.php"
})
})
</script>
</head>
<body>
<div class="ui-widget">
<label for="acInput">Flower Name: </label><input type="text" name="acInput" id="acInput">
</div>
</body>
</html>
我想创建一个PHP文件（autocomplete.PHP，它将在同一目录中），它将搜索数组并返回响应：
我尝试了以下方法：
<?php
$flowers = ["Aster", "Daffodil", "Rose","Peony", "Primula", "Snowdrop", "Poppy", "Primrose", "Petuna", "Pansy"];
$matches = [];
if (isset($_GET["term"])) {
$term = trim($_GET["term"]); // do I need to remove/strip tags or escape it and what is the best way?
if (!empty($term)) {
$pattern = '/^'+$term+'/';
foreach ($flowers as $cvet) {
preg_match($pattern, $cvet, $matches);
}
echo json_encode($matches);
}
}
但它不起作用。我认为问题与$pattern或preg_match有关，因为这是我第一次在PHP中使用正则表达式？
编辑：我要检查的是：
1.数组$flowers中是否存在等于$term或以$term开头的值；
2.包含$term的$flowers数组中是否有值。
将所有这些$flowers数组值（元素）返回给jQuery自动完成，并将其显示为建议。谢谢
我宁愿给您一个非常简化的版本，而不使用regex:
<?php
$flowers = ["Aster", "Daffodil", "Rose","Peony", "Primula", "Snowdrop", "Poppy", "Primrose", "Petuna", "Pansy"];
// If the `term` is set.
if (isset($_GET["term"])) {
$flowers = array_filter($flowers, "filter_out");
}
// Callback function for the array to filter only those values contain the term.
function filter_out ($var) {
return strpos($var, $_GET["term"]) !== false;
}
// encode and send it back.
echo json_encode($flowers);
输出
请求：autocomplete.php
响应
["Aster","Daffodil","Rose","Peony","Primula","Snowdrop","Poppy","Primrose","Petuna","Pansy"]
请求：autocomplete.php?term=p
响应：
["Snowdrop","Poppy"]
<?php
$flowers = ["aster", "daffodil", "rose","peony", "primula", "snowdrop", "poppy", "primrose", "petuna", "pansy"];
$matches = [];
if (isset($_GET["term"]) && !empty($_GET["term"])) {
$term = trim( strip_tags($_GET["term"]) );
if (!empty($term)) {
$pattern = '/^'. strtolower($term) .'/ui';
foreach ($flowers as $cvet) {
preg_match($pattern, $cvet, $m);
if(isset($m[0])) $matches[] = $m[0]; // or ucfirst($m[0]) (if you want)
}
echo json_encode($matches);
}
}