如何编写PHP函数以抓取任何网页的HTML源代码？

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plaintextfunction display_sourcecode($url) { $lines=file($url); $output=; foreach ($lines as $line_num=> $line) { // loop through each line and prepend line numbers $output .=Line . ($line_num + 1) . : . $line; } return $output;}

function display_sourcecode($url) { $lines = file($url); $output = ""; foreach ($lines as $line_num => $line) { // loop thru each line and prepend line numbers $output.= "Line #<b>{$line_num}</b> : " . htmlspecialchars($line) . "<br>\n"; } }

用法：

<?php $url = "www.open-open.com"; $source = display_sourcecode($url); echo $source; ?>