Example of obtaining images and DIV content in web pages with php

Example of obtaining images and DIV content in web pages with php_PHP tutorial

WBOY

Release： 2016-07-13 10:27:36

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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>?>

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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>?>

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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>?>

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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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