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I am reading the contents of some files with file_get_contents the files contain a series of links and images. Ideally, they should all look like this. The link and image will always be the same matching 8 digit numbers like this...

<a href= /item/33333333 >
<img src="https://www.example.com/33333333.gif"></a>

<a href= /item/12345678 >
<img src="https://www.example.com/12345678.gif"></a>

有时,错误形象将显示,而不是 g。此处注明该错误的档案内容......

<a href= /item/77778888 >
<img src="/images/default.svg"></a>

<a href= /item/33333333 >
<img src="https://www.example.com/33333333.gif"></a>

<a href= /item/12345678 >
<img src="https://www.example.com/12345678.gif"></a>

<a href= /item/22225555 >
<img src="/images/default.svg"></a>

因此,我需要最终结果。

<a href= /item/77778888 >
<img src="https://www.example.com/77778888.gif"></a>

<a href= /item/33333333 >
<img src="https://www.example.com/33333333.gif"></a>

<a href= /item/12345678 >
<img src="https://www.example.com/12345678.gif"></a>

<a href= /item/22225555 >
<img src="https://www.example.com/22225555.gif"></a>

I m not sure how to go about figuring out what 8 digit number appears before each default.svg and replacing it. Would we have to look back a certain number of characters each time default.svg appears to get that number?

增编

Answer 1

如果该档案是.php,那么它可能要存放一些变数的回路,如Rravel或 yii2 (home_url = HOME),或者使之难以编码。

最后应:

// Define variables
$itemNumber =  77778888 ;
$imageUrl =  https://www.example.com/  . $itemNumber .  .gif ;
?>
<a href= /item/<?php echo $itemNumber; ?> >
    <img src="<?php echo $imageUrl; ?>">
</a>```

Answer 2

类似于

if (preg_match_all( @<as+href= /item/(d{8}) >s+<img@ , $fileContent, $matches)) {
    foreach ($matches[1] as $id) {
        echo "<a href= /item/$id >
<img src= https://www.example.com/$id.gif ></a>

";
}

但我担心这一形象<代码>https://www.example.com/777788.gif。不可能

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