正確匹配每個影像檔案的名稱[PHP]

我將文本中的影像鏈接替換為以下格式。

{#img='xxxx-xxxx-xxxx-xxxx.abc', alt=''}

在更改之前，我src從影像鏈接中獲取部分并在 CURL 的幫助下將其下載到服務器。我為下載的每個影像進行 UUID 命名。

到目前為止一切都很好！

$newImageName = create_uuid();
$ch = curl_init($img->getAttribute('src'));
$fp = fopen('/PATH_SAMPLE/' . $newImageName . '.jpg', 'wb');
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_exec($ch);
curl_close($ch);
fclose($fp);

然而; 每個影像都有不同的 UUID，但由于重新格式化，最終的 UUID 被渲染為文本；例如像這樣；

asdasd {#img='19a1cb87-009b-4495-be22-68fb08db8a76', alt=''} asdasd {#img='19a1cb87-009b-4495-be22-68fb08db8a76', alt=''}

所有代碼；

$jsonFile = "asdasd <img src='https://example.com/image_1.png'> asdasd <img src='https://example.com/image_1.jpg'>";
    $dom = new DOMDocument;
    $dom->loadHTML($jsonFile);
    $imgs = $dom->getElementsByTagName('img');
    $imgURLs = []; 
    foreach ($imgs as $img) {
        if (!$img->hasAttribute('src')) {
            continue;
        } else {
            $newImageName = create_uuid();
            $ch = curl_init($img->getAttribute('src'));
            $fp = fopen('/PATH_SAMPLE/' . $newImageName . '.jpg', 'wb');
            curl_setopt($ch, CURLOPT_FILE, $fp);
            curl_setopt($ch, CURLOPT_HEADER, 0);
            curl_exec($ch);
            curl_close($ch);
            fclose($fp);
            $str = preg_replace('/<img[^>]*src=([\'"])(.*?)\1>/', "{#img='" . $newImageName . "', alt=''}", $jsonFile);
            
        }
    }

如何解決影像的 UUID 問題？

uj5u.com熱心網友回復：

$newImageName = create_uuid().'.jpg';

假設ofc您可以將png檔案錯誤地命名為jpg。

順便說一句，如果你愿意的話，我可以建議而不是 uuid

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$image_binary=curl_exec($ch);
$image_name=hash('sha224',$image_binary).'.jpg';
$image_path = '/PATH_SAMPLE/' . $image_name;
if(!file_exists($image_path)){
    file_put_contents($image_path,$image_binary);
}

您將避免保存重復的影像，浪費磁盤空間。（如果您真的擔心記憶體使用情況，也可以使用 tmpfile() CURLOPT_FILE hash_file() rename(stream_get_meta_data($tmpfile)['uri']) 優化此選項以不將整個影像保存在 ram 中 ^ ^)

aaalso，切掉這個廢話

$str = preg_replace('/<img[^>]*src=([\'"])(.*?)\1>/', "{#img='" . $newImageName . "', alt=''}", $jsonFile);

只是做$img->setAttribute("src",$image_name);，當你準備好更新 $jsonFile 時，做$jsonFile=$dom->saveHTML();。

我個人可能會這樣寫

    $jsonFile = "asdasd <img src='https://example.com/image_1.png'> asdasd <img src='https://example.com/image_1.jpg'>";
    $dom = new DOMDocument ();
    $rootName = "root" . bin2hex ( random_bytes ( 10 ) );
    $dom->loadHTML ( "<?xml encoding=\"UTF-8\"><{$rootName}>{$jsonFile}</{$rootName}>" );
    $imgs = $dom->getElementsByTagName ( 'img' );
    $imgURLs = [ ];
    $ch = curl_init ();
    foreach ( $imgs as $img ) {
        if (!$img->hasAttribute ( 'src' )) {
            continue;
        } else {
            $tmphandle = tmpfile ();
            $tmpfile = stream_get_meta_data ( $tmphandle ) ['uri'];
            curl_setopt_array ( $ch, array (
                    CURLOPT_FILE => $tmphandle,
                    CURLOPT_URL => $img->getAttribute ( "src" )
            ) );
            curl_exec ( $ch );
            // optimization note: the file hashing could be done incrementally in-ram by using CURLOPT_WRITEFUNCTION hash_init() hash_update() instead of hash_file()
            $image_name = hash_file ( 'sha224', $tmpfile ) . '.jpg';
            $fp = '/PATH_SAMPLE/' . $image_name;
            if (file_exists ( $fp )) {
                // this is a duplicate image
            } else {
                if (PHP_OS_FAMILY === "Windows") {
                    // optimization note, on pretty much every OS except Windows, you can move files with open handles, but not on Windows..
                    // this is slower, but Windows-compatible
                    copy ( $tmpfile, $fp );
                } else {
                    // this is faster, but not Windows-compatible
                    rename ( $tmpfile, $fp );
                }
            }
            fclose ( $tmpfile );
            $img->setAttribute ( "src", $image_name );
        }
    }
    $str = $dom->saveHTML ( $dom->getElementsByTagName ( $rootName )->item ( 0 ) );
    $str = substr ( $str, strlen ( "<{$rootName}>" ), -strlen ( "</{$rootName}>" ) );
    curl_close ( $ch );

標籤：php 数组 卷曲 dom

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