如何使用php getStr获取html标记的“名称”属性？

Question

I'm trying to find a way to get the content of this HTML attribute "name", using PHP getStr, I can't get it to work anyhow, I have already searched, but I couldn't find find something that may help me.

<input id="9d6e793e-eed2-4095-860a-41ca7f89396b.subject" maxlength="50" name="9d6e793e-eed2-4095-860a-41ca7f89396b:subject" value="" tabindex="1" class="subject required field" type="text"/>

I want to get this value into a string:

9d6e793e-eed2-4095-860a-41ca7f89396b:subject

I can get the value of a tag like this one:

<input type="hidden" name="message" value="1442814179635.Oz1LxjnxVCMMJ0QpV0wGLx4roEA="/>

With this code:

getStr($b,'name="message" value="','"');

But I can't find a way to get the attribute name of the first one?

Answer 1

Use regular expressions in PHP. This code should be helpful:

<?php

$str  = '<input type="hidden" name="message" value="1442814179635.Oz1LxjnxVCMMJ0QpV0wGLx4roEA="/>';

//forward slashes are the start and end delimeters
//third parameter is the array we want to fill with matches
if (preg_match('/name="([^"]+)"/', $str, $m)) {
    print $m[1];   
} else {
   //preg_match returns the number of matches found, 
   //so if here didn't match pattern
}

Output:

message

Answer 2

Check the PHP DOMElement::getAttribute method. It's all in the manual

Here you go:

<?php
$html = '<input id="9d6e793e-eed2-4095-860a-41ca7f89396b.subject" maxlength="50" name="9d6e793e-eed2-4095-860a-41ca7f89396b:subject" value="" tabindex="1" class="subject required field" type="text"/>';
$doc = new DOMDocument;
$doc->loadHTML($html);
$elements = $doc->getElementsByTagName("input");
foreach($elements as $element){
   echo $element->getAttribute('name');
}
?>

Answer 3

This bit of code will do what you want:

    <?php

        $b = '<input id="9d6e793e-eed2-4095-860a-41ca7f89396b.subject" maxlength="50" name="9d6e793e-eed2-4095-860a-41ca7f89396b:subject" value="" tabindex="1" class="subject required field" type="text"/>';

        echo "\$b = $b\n";

        $rest = substr(strstr($b,'name="'),6);

        echo "\$rest = $rest\n";

        $name = strstr($rest,'"',true);

        echo "\$name = $name\n";

    ?>