PHP表单提交和解析

Question

I am looking to use PHP to get a few random paragraphs from this site: http://watchout4snakes.com/CreativityTools/RandomParagraph/RandomParagraph.aspx

What's the shortest set of code to initiate the Submit button (don't need to fill in the text fields) and parse out only the resultant random text?

Can't seem to get the submit piece to work.

Answer 1

More flexible way - fetch viewstate and eventvalidation dynamically:

<?php
$url = 'http://watchout4snakes.com/CreativityTools/RandomParagraph/RandomParagraph.aspx';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); 
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0)'); 
$c = curl_exec($ch); 
curl_close($ch); 

//__VIEWSTATE
$viewstate = '';

//__EVENTVALIDATION
$eventvalidation = '';

// Fetch VIEWSTATE
$p1 = '<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="';
$p = strpos($c, $p1);
if ($p !== false) {
    $s = substr($c, $p+strlen($p1));
    $pcs = explode('"', $s);
    if (!empty($pcs[0])) {
        $viewstate = $pcs[0];
    }
}

// Fetch EVENTVALIDATION
$p1 = '<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="';
$p = strpos($c, $p1);
if ($p !== false) {
    $s = substr($c, $p+strlen($p1));
    $pcs = explode('"', $s);
    if (!empty($pcs[0])) {
        $eventvalidation = $pcs[0];
    }
}

// PUT YOUR OBJECT & SUBJECT HERE
$postvalues = array(
    'tmpl$main$txtSubject' => '',
    'tmpl$main$txtObject' => '',
    'tmpl$main$btnNew' => 'New Paragraph',
);

$url = 'http://watchout4snakes.com/CreativityTools/RandomParagraph/RandomParagraph.aspx?__VIEWSTATE='.urlencode($viewstate).'&__EVENTVALIDATION='.urlencode($eventvalidation).'&tmpl%24main%24txtSubject='.urlencode($postalues['tmpl$main$txtSubject']).'&tmpl%24main%24txtObject='.urlencode($postalues['tmpl$main$txtObject']).'&tmpl%24main%24btnNew=New%20Paragraph';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); 
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0)'); 
$c = curl_exec($ch); 
curl_close($ch); 


$t = '<span id="tmpl_main_lblPara" class="randomSentence">';
$p = strpos($c, $t);
if ($p !== false) {
    $s = substr($c, $p + strlen($t));
    $pcs = explode('</span>', $s);


   echo $pcs[0]; 
}