foreach循环问题

Question

I made this code :

$matches = array();
preg_match_all('/"Type":".+?",/', $text, $matches);


foreach($matches[0] as $match) {
    if (isset($_GET['dvd']) && !empty($_GET['dvd'])) {
        $dvd = $_GET['dvd'];
        if (stripos($match, 'DVD') !== false) {
            $match = '';
        }
    }
    echo $match;
}

In this code i search for the word "type" in $text and it stores the whole line with the words ahead of it in the array. And then i loop through each one and see if the word DVD is there. If it is then, it removes it and displays a blank line.

---

Now I also want to search for suppose manufacturer and display it beneath every type returned.

So it should return suppose the result :

Type: HDD
Manufacturer: WD

Type: Flash Drive
Manufacturer: Transcend

Type: CD
Manufacturer: Sony

So I tried it with putting another preg_match_all expression:

$anotherMatch = array();
preg_match_all('/"Manufacturer":".+?",/', $text, $anotherMatch);

And I tried combining this with the previous foreach expression with an && operator but it didn't work. Also I tried different foreach expressions and then one for echoing at the end. but that also didn't work.

Can you tell me how to achieve the desired result. Thanks...

Answer 1

Given source input like this:

"Type":"HDD",
"Manufacturer":"WD",
"Other":"Nonsense",
"Type":"Flash Drive",
"Manufacturer":"Transcend",
"Other":"More nonsense",
"Type":"CD",
"Manufacturer":"Sony",
"Other":"Yet even more nonsense",

And expecting output like this:

Type: HDD
Manufacturer: WD

Type: Flash Drive
Manufacturer: Transcend

Type: CD
Manufacturer: Sony

You could use this regular expression:

/"(Type|Manufacturer)":"([^"]+?)",/

And loop over it like this:

preg_match_all('/"(Type|Manufacturer)":"([^"]+?)",/', $text, $matches);

foreach($matches[0] as $match => $line)
{
    if (!empty($_GET['dvd']) && stripos($matches[2], 'DVD') !== false)
    {
        continue;
    }
    echo $matches[1][$match] . ': ' . $matches[2][$match] . "
";
}

Although, I don't think that will do quite exactly what you want it to.