用GET方法改变变量

Question

I have a page test.php in which I have a list of names:

name1: 992345
name2: 332345
name3: 558645
name4: 434544

In another page test1.php?id=name2 and the result should be:

332345

I've tried this PHP code:

<?php 
libxml_use_internal_errors(true); 
$doc = new DOMDocument(); 
$doc->loadHTMLFile("/test.php"); 
$xpath = new DOMXpath($doc); 
$elements = $xpath->query("//*@".$_GET["id"]."");
if (!is_null($elements)) {
foreach ($elements as $element) {
$nodes = $element->childNodes;
foreach ($nodes as $node) {
echo $node->nodeValue. "
";
}
}
}
?>

I need to be able to change the name with GET PHP method in test1.pdp?id=name4

The result should be different now.

434544

is there another way, becose mine won't work?

Answer 1

Here is another way to do it.

<?php 
libxml_use_internal_errors(true); 

/* file function reads your text file into an array. */
$doc = file("test.php"); 

$id = $_GET["id"];

/* Show your array. You can remove this part after you 
 * are sure your text file is read correct.*/

echo "Seeking id: $id<br>";
echo "Elements:<pre>";
print_r($doc);
echo "</pre>";

/* this part is searching for the get variable. */

if (!is_null($doc)) {
    foreach ($doc as $line) {
        if(strpos($line,$id) !== false){
            $search = $id.": ";
            $replace = '';
            echo str_replace($search, $replace, $line);
        }
    }
} else {
    echo "No elements.";    
    }
?>