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I know regex isn't popular here, what is the best way to extract a value of an input tag within an HTML form using a php script?
for example:
some divs/tables etc..
<form action="blabla.php" method=post> <input type="text" name="campaign"> <input type="text" name="id" value="this-is-what-i-am-trying-to-extract"> </form>
some divs/tables etc..
Thanks
879
How do you get input field value in PHP without submit? Using JavaScript we can get the element. Or you can also use jquery to access the value. by using id = "something" and retrieve it using $('#something').
Method 1: Using readline() function is a built-in function in PHP. This function is used to read console input.
The PHP superglobals $_GET and $_POST are used to collect form-data.
If you want to extract some data from some HTML string, the best solution is often to work with the DOMDocument class, that can load HTML to a DOM Tree.
Then, you can use any DOM-related way of extracting data, like, for example, XPath queries.
Here, you could use something like this :
$html = <<<HTML
<form action="blabla.php" method=post>
<input type="text" name="campaign">
<input type="text" name="id" value="this-is-what-i-am-trying-to-extract">
</form>
HTML;
$dom = new DOMDocument();
$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$tags = $xpath->query('//input[@name="id"]');
foreach ($tags as $tag) {
var_dump(trim($tag->getAttribute('value')));
}
And you'd get :
string 'this-is-what-i-am-trying-to-extract' (length=35)
$html=new DOMDocument();
$html->loadHTML('<form action="blabla.php" method=post>
<input type="text" name="campaign">
<input type="text" name="id" value="this-is-what-i-am-trying-to-extract">
</form>');
$els=$html->getelementsbytagname('input');
foreach($els as $inp)
{
$name=$inp->getAttribute('name');
if($name=='id'){
$what_you_are_trying_to_extract=$inp->getAttribute('value');
break;
}
}
echo $what_you_are_trying_to_extract;
//produces: this-is-what-i-am-trying-to-extract
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