Take an input value by name

Question

Hello,

I have the following function:

function capturar($string, $start, $end) {
    $str = explode($start, $string);
    $str = explode($end, $str[1]);
    return $str[0];
}

I use it with Curl, to get the value of an input.

Example of use:

$pagina = curl("http://example.com");
$texto = capturar($pagina, 'name="texto"', '"');
echo $texto;

Then in the case, PHP would return the input value or any tag that has the name of texto, so far so good, but the page that Curl accesses has the following input:

<input value="João Lima" name="texto" id="texto"/>

How would I get the value of the input in this order?

Thanks in advance.

---

Current code I’m using:

<?php
function curl($url) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($ch, CURLOPT_COOKIESESSION, true);
    curl_setopt($ch, CURLOPT_COOKIEJAR, getcwd().'/test.txt');
    curl_setopt($ch, CURLOPT_COOKIEFILE, getcwd().'/test.txt');
    curl_setopt($ch, CURLOPT_VERBOSE, 1);
    $data = curl_exec($ch);
    curl_close($ch);
    return $data;
}
$array = [];
preg_match('/value="([^"]+)"/e', curl('http://example.com'), $array);
var_dump($array);
echo '<br><br><br><br>'.curl('http://example.com');

This page has other inputs, but has an input with the value of 11.5, 12, 12.5.

Answer 1

I think the ideal is to use your own Xpath, native to PHP.

---

In this case it uses the //input[@name="texto"] that to get the input which contains the attribute of name of texto.

That way I’d be like:

$html = curl("http://example.com");

$DOM = new DOMDocument;
$DOM->loadHTML($html);
$XPath = new DomXPath($DOM);

// Procura pelo elemento:
$inputs = $XPath->query('//input[@name="texto"]');

// Para cada //input[@name="texto"] (já que pode haver mais de um) e exibe o `value`.
foreach($inputs as $_ => $input){
    echo $input->getAttribute('value');
}

Answer 2

If it is a single input, this should solve:

$conteudo = '<input value="João Lima" name="texto" id="texto"/>';
$array = [];
preg_match('/value="([^"]+)"/e',$conteudo,$array);
var_dump($array);

This is just one example, it should be adapted. The $conteudo should be the return of your request made with CURL.