我正在构建一个脚本，目标是检查多达100个URLS的有效性（No 404）。
URL中唯一的变量是页码，如下所示：
http://example.com/category/id/products/page/1
http://example.com/category/id/products/page/2
等等高达100，
一旦我的代码到达一个无效的URL，我希望它停止并回显它到达的号码，这是我试图无效的代码：
$url ="http://example.com/category/id/products/page/1";
if (false !== strpos($url, $id)) {
$pageNumber = 2;
$check = true;
do{
$urlIterate = "http://example.com/category/id/products/page/".$pageNumber;
if(false !== strpos($urlIterate, $id)){
$pageNumber++;
}
else{
$check = false;
}
}
while($pageNumber <= 99);
}
else{
$check = false;
echo 'No pages were found at all';
}
echo "There were ". $pageNumber." pages.;
?>
我不确定这是否是你想要的，但试试这个：
<?php
$id_to_search = "90";
for ($i = 1; $i <= 100; $i++) {
$url = "http://example.com/category/id/products/page/" . $i;
$values = parse_url($url);
$paths = explode('/', $values['path']);
$id_from_url = $paths[5];
if ($id_to_search === $id_from_url) {
$headers = get_headers($url);
if ($headers[0] == 'HTTP/1.0 404 Not Found') {
echo "URL Found! URL is invalid(404). URLs searched = " . $i . "<br>";
} else {
echo "URL is valid<br>";
}
} else {
echo "URL was searched but it does not match the ID we are looking for<br>";
}
}
为什么不使用for循环？当我们知道需要多少迭代时，情况会更好。
for($i = 1; $1<=100; $i++){
$urlIterate = "http://example.com/category/id/products/page/".$i; //generate url
$headers = get_headers($urlIterate, 1); //get headers
if($headers[0] != 'HTTP/1.1 200 OK'){ //if we have an error
if($i > 1) //if there was at least one found
echo 'Last found number is ' . ($i-1);
else
echo 'No pages were found at all';
break; //stops the 'for' loop
}
}
您的代码正在URL中查找$id，这有什么意义？