Get Value From Textbox to File_get_contents - php

Question

<div class="form-group">
<label for="inputsm">Put URL</label>
<input class="form-control input-sm" id="inputsm" type="text">
<br>
<input type="submit" class="btn btn-info" value="Count Contact">
</div>
This code is my text box and button
<?php
$getText = file_get_contents("", true);
$Contact = substr_count($getText ,"CONTACTID");
print_r($Contact);
?>
and this code is php for get a value and count
Example
I need to put this link https://s3-ap-southeast-1.amazonaws.com/cloudpoc2/us-east-1%3A4502ecdd-1994-40da-8eb2-b6ccc96d6be0/Contacts/Contact_2014_11_19_09_53_28_278.vcf in text box
and click button it show number of contact in this file
$getText = file_get_contents("https://s3-ap-southeast-1.amazonaws.com/cloudpoc2/us-east-1%3A4502ecdd-1994-40da-8eb2-b6ccc96d6be0/Contacts/Contact_2014_11_19_09_53_28_278.vcf", true);

Answer 1

You have to submit your form through POST or GET. My example will use POST. You also must assign a name to the elements you're posting (such as URL). This is untested, so it may have some errors. But it will give you an idea.
<?php
if(isset($_POST['submit'])){
$url = $_POST['url'];
$getText = file_get_contents("$url", true);
$Contact = substr_count($getText ,"CONTACTID");
print_r($Contact);
}
?>
<form method="POST" action="?">
<div class="form-group">
<label for="inputsm">Put URL</label>
<input name="url" class="form-control input-sm" id="inputsm" type="text">
<br>
<input name="submit" type="submit" class="btn btn-info" value="Count Contact">
</div>
</form>