


Example of obtaining images and DIV content in web pages with php_PHP tutorial
Share the simple method of obtaining images and DIV content in web pages using php, which is all implemented through regular expressions.
1. Get all the pictures in the webpage:
<?<span>php </span><span>//</span><span>取得指定位址的內容,并储存至 $text </span> <span>$text</span>=<span>file_get_contents</span>('http://www.jbxue.com/'<span>); </span><span>//</span><span>取得所有img标签,并储存至二维数组 $match 中 </span> <span>preg_match_all</span>('/<img[^>]*>/i', <span>$text</span>, <span>$match</span><span>); </span><span>//</span><span>打印出match </span> <span>print_r</span>(<span>$match</span><span>); </span>?>
2. Get the first picture on the webpage:
<?<span>php </span><span>//</span><span>取得指定位址的內容,并储存至 $text </span> <span>$text</span>=<span>file_get_contents</span>('http://www.jbxue.com/'<span>); </span><span>//</span><span>取得第一个 img 标签,并储存至二维数组 $match 中 </span> <span>preg_match</span>('/<img[^>]*>/Ui', <span>$text</span>, <span>$match</span><span>); </span><span>//</span><span>打印出match</span> <span>print_r</span>(<span>$match</span><span>); </span>?>
3. Get specific div block data in the specified web page:
<?<span>php </span><span>//</span><span>取得指定位址的內容,并储存至 $text </span> <span>$text</span>=<span>file_get_contents</span>('http://www.jbxue.com/'<span>); </span><span>//</span><span>去除换行及空白字符(序列化內容才需使用) //$text=str_replace(array("/r","/n","/t","/s"), '', $text); //取出 div 标签且 id 为 PostContent 的內容,并储存至二维数组 $match 中 </span> <span>preg_match</span>('/<div[^>]*id="PostContent"[^>]*>(.*?) <//div>/si',<span>$text</span>,<span>$match</span><span>); </span><span>//</span><span>打印出match[0]</span> <span>print</span>(<span>$match</span>[0<span>]); </span>?>
4. Combination of 2 and 3 above:
<?<span>php </span><span>//</span><span>取得指定位址的內容,并储存至 $text </span> <span>$text</span>=<span>file_get_contents</span>('http://www.jbxue.com/'<span>); </span><span>//</span><span>取出 div 标签且 id 为 PostContent 的內容,并储存至二维数组 $match 中 </span> <span>preg_match</span>('/<div[^>]*id="PostContent"[^>]*>(.*?) <//div>/si',<span>$text</span>,<span>$match</span><span>); </span><span>//</span><span>取得第一个 img 标签,并储存至二维数组 $match2 中 </span> <span>preg_match</span>('/<img[^>]*>/Ui', <span>$text</span>, <span>$match2</span><span>); </span><span>//</span><span>打印出match2[0] </span> <span>print_r</span>(<span>$match2</span>[0<span>]); </span>?>

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