function detect Unicode UTF-8 string PHP

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Based upon that snippet below using preg_match() I needed something faster and less specific.  That function works and is brilliant but it scans the entire strings and checks that it conforms to UTF-8

function detectUTF8($string)
        return preg_match('%(?:
        [\xC2-\xDF][\x80-\xBF]        # non-overlong 2-byte
        |\xE0[\xA0-\xBF][\x80-\xBF]               # excluding overlongs
        |[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}      # straight 3-byte
        |\xED[\x80-\x9F][\x80-\xBF]               # excluding surrogates
        |\xF0[\x90-\xBF][\x80-\xBF]{2}    # planes 1-3
        |[\xF1-\xF3][\x80-\xBF]{3}                  # planes 4-15
        |\xF4[\x80-\x8F][\x80-\xBF]{2}    # plane 16
        )+%xs', $string);

Tooltips In only CSS3 And HTML5, Without JavaScript

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Tooltips in HTML pages general do not need any effort from a developer’s side, as long as they put proper title attributes to their elements. The title is then used for showing the tooltip, but also for other things, such as providing a screen reader with proper content. Speaking of the use case of tooltips, the visual presentation depends on the browser your site gets visited with. Developers with the need for more control turned to JavaScript bases solutions years ago. Kashagra Gour created Hint.css, which proves as a decent alternative, based completely on CSS and HTML.

Hint.css – Data Attributes, CSS3 Transitions, Pseudo Elements and the Content Property

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HTML5 Jquery tooltip

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Tooltips are a square deal. They allow for the placement of important information just in the very location this information is needed, regardless of screen real estate. Tooltipster is a plugin for jQuery aiming at making the process of creating tooltips as easy as possible while providing the biggest functionality available. They conform to HTML5 and can be styled to your own liking using CSS.

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CSS to align label and input

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HTML Code Snippet:
<fieldset id="o-bs-sum-buginfo">
  <label for="o-bs-sum-bug-ErrorPrefix">Error Prefix</label>
  <input type="text" id="o-bs-sum-bug-ErrorPrefix" name="ErrorPrefix" value="" />

  <label for="o-bs-sum-bug-ErrorNumber">Error Number</label>
  <input type="text" id="o-bs-sum-bug-ErrorNumber" name="ErrorNumber" value="" />
Using only CSS (or jquery), irrespective of the browser size, I want to pair label and input elements next to each other. I also do have freedom to change tweak the HTML. if required.

Put the every label with its corresponding input into a p tag. Then add the following css:
  width:100px; //whatever width that suits your needs

    margin:10px 0; //manipulate the vertical spaces for each input..  

<fieldset >
    <label for="o-bs-sum-bug-ErrorPrefix">Error Prefix</label>
    <input type="text"  name="ErrorPrefix" value="" />

jquery disable form submit on enter

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You can disable button on Submit but user can Enter to submit.

So you i use this code:

I have the following javascript in my page which does not seem to be working.
$('form').bind("keypress", function(e) {
  if (e.keyCode == 13) {               
    return false;
I'd like to disable submitting the form on enter, or better yet, to call my ajax form submit. Either solution is acceptable but the code I'm including above does not prevent the form from submitting.


jquery disable form submit on enter

Usually form is submitted on Enter when you have focus on input elements.
We can disable Enter press on input elements within a form:
$("form :input").on("keypress", function(e) {
    return e.keyCode != 13;

Get Remote file size without downloading file

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Is there a way to get the size of a remote file http://my_url/my_file.txt without downloading the file?


Found something about this :
Here's the best way (that I've found) to get the size of a remote file. Note that HEAD requests don't get the actual body of the request, they just retrieve the headers. So making a HEAD request to a resource that is 100MB will take the same amount of time as a HEAD request to a resource that is 1KB.
<?php/** * Returns the size of a file without downloading it, or -1 if the file * size could not be determined. * * @param $url - The location of the remote file to download. Cannot * be null or empty. * * @return The size of the file referenced by $url, or -1 if the size * could not be determined. */function curl_get_file_size( $url ) {  // Assume failure.  $result = -1;  $curl = curl_init( $url );  // Issue a HEAD request and follow any redirects.  curl_setopt( $curl, CURLOPT_NOBODY, true );  curl_setopt( $curl, CURLOPT_HEADER, true );  curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );  curl_setopt( $curl, CURLOPT_FOLLOWLOCATION, true );  curl_setopt( $curl, CURLOPT_USERAGENT, get_user_agent_string() );  $data = curl_exec( $curl );  curl_close( $curl );  if( $data ) {    $content_length = "unknown";    $status = "unknown";    if( preg_match( "/^HTTP\/1\.[01] (\d\d\d)/", $data, $matches ) ) {      $status = (int)$matches[1];    }    if( preg_match( "/Content-Length: (\d+)/", $data, $matches ) ) {      $content_length = (int)$matches[1];    }    //     if( $status == 200 || ($status > 300 && $status <= 308) ) {      $result = $content_length;    }  }  return $result;}?>
$file_size = curl_get_file_size( "" );

PHP: Remote file size without downloading file

Prevent multiple inserts when submitting a form in PHP

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Sometimes the user may press Enter twice, and the post is inserted twice.

Is there a solution to prevent this other than check if there is already a post with the same title and content?

1- Use JavaScript to stop it from sending

2 - disable the submit button once the user has submitted the form, using JavaScript. That is what, for example
3 - Include a unique token on each POST worked for me. However, my form still submits when a user refreshes the page (F5). I managed to solve this by adding a reset:
            // reset session token
            $_SESSION['token'] = md5( $_POST['token'] . time() );
my final scripts goes like:
if (isset($_SESSION['token'])) {
    if (isset($_POST['token'])) {
        if ($_POST['token'] != $_SESSION['token']) {
            echo '<h3>Oops! You already submitted this request.</h3>';
        } else {
            // process form
            // reset session token
            $_SESSION['token'] = md5( $_POST['token'] . time() );
    } else {
        echo 'post token not set';
        $_SESSION['token'] = md5( $somevariable . time() );
oh! don't forget to add session_start(); before <!DOCTYPE>
I am a PHP newbie so please correct me if you find irregularities.

How to prevent multiple inserts when submitting a form in PHP?