32 lines
887 B
PHP
32 lines
887 B
PHP
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<?php
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class ImageCache {
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private $cacheDir;
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private $cacheDuration = 604800; // 7天缓存
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public function __construct() {
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$this->cacheDir = __DIR__ . '/images/';
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if (!file_exists($this->cacheDir)) {
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mkdir($this->cacheDir, 0777, true);
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}
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}
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public function getCachedImage($url) {
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$cacheFile = $this->cacheDir . md5($url);
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if (file_exists($cacheFile) && (time() - filemtime($cacheFile) < $this->cacheDuration)) {
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return file_get_contents($cacheFile);
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}
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$imageContent = file_get_contents($url);
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if ($imageContent !== false) {
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file_put_contents($cacheFile, $imageContent);
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return $imageContent;
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}
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return false;
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}
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public function getCacheUrl($url) {
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return 'cache/image.php?url=' . urlencode($url);
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}
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}
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