Long story short, I want users to be able to call the value of the variable $city_name into a string that they will submit.
Here's my code;
<?php
if(!isset($post_text)) {
$city_name = "Dallas";
$post_text = $_POST['post_text'];
echo($post_text);
}
?>
<html>
<head></head>
<body>
<form action="" method="post">
<input name="post_text" type="text" value="enter text here" />
<input type="submit" value="submit" />
</form>
I was under the impression that calling $city_name in the form field post_text would return "Dallas", unfortunately that's not the case.
If anyone has any advice or information on what alterations I could add to this code in order to allow the user to call the value of $city_name, it would be greatly appreciated :)!!
Based on your comment:
I would like for the user to be able to input and submit a string such as "I am going to $city_name" and have "I am going to Dallas" echoed on submit.
This is the code:
$city_name = "Dallas";
$post_text = str_replace('$city_name', $city_name, $_POST['post_text']);
echo $post_text;
It's important to use single quotes around '$city_name' here as you are searching for the literal text $city_name and not the contents of the variable $city_name.
Related
I want to have a simple HTML input field where people can type all kinds of nonsense. For example, a user types: "Hello, I'm Nicky". When the user then clicks the button Send, I want a simple PHP script to replace the word "Nicky" to "Nicki" and show it to the user. So basially, just a simple PHP script which replaces specific words from an input field and then print out the exact same line the user has inputted, except show Nicki instead of Nicky.
How can I achieve this, in the most simplest way?
My code looks like this now:
<?php
$_POST['name'] = str_replace("Nicky","Nicki",$_POST['name']);
?>
<form method="post">
<input type="text" name="name">
<input type="submit">
</form>
<?php
if(isset($_POST['form-action']) && $_POST['form-action'] == "submit-form"){ // form has been submitted
echo "<p>BEFORE: ".$_POST['name']."</p>"; // what the user entered "Nicky"
$_POST['name'] = str_replace("Nicky","Nicki",$_POST['name']); // find/replace Nicky with Nicki
echo "<p>AFTER: ".$_POST['name']."</p>"; // what the $_POST['name'] now is
}
?>
<form method="post">
<input type="text" name="name" value="Nicky">
<input type="submit">
<input type="hidden" name="form-action" value="submit-form">
</form>
In addition to this, if you want to expand the Find & Replace variables, you could use an array:
$FindReplace = array("Nicky"=>"Nicki", "Blue"=>"Red"); // build an array of find/replace variables
....
foreach($_POST as $Name=>$Value){
echo "<p>Before: ".$Name."=".$Value."</p>"
foreach($FindReplace as $Find=>$Replace){
$Value = str_replace($Find,$Replace,$Value);
}
echo "<p>After: ".$Name."=".$Value."</p>"
}
I have strange problem with my search form. After I enter keyword and do the search request I get empty parameter value.
For example I type in the search field the word "something"
I see an empty value:
search.php?keyword=
After this I enter the keyword "else" and I recieve:
search.php?keyword=something instead of search.php?keyword=else
They somehow appear with "one step back"
I was trying to debug with print_r and var_dump but I only can print some values that does not explain my problem.
Am I missing something very trivial?
Here is what I have:
My class function:
public function show_search_result() {
$this->search_keywords = strip_tags($_GET['keyword']);
$this->_db->query("SELECT * from posts WHERE post_title LIKE '%$this->search_keywords%' OR post_content LIKE '%$this->search_keywords%' LIMIT 100");
$this->rows_results_found = $this->_db->resultset();
}
And my form:
<form action="search.php?keyword=<?php
if (isset($search_results->rows_results_found) && isset($_POST['search_requested'])) {
print strip_tags($_POST['search_keywords']);
}
?>" method="post">
<input type="hidden" name="search_requested">
<input type="text" name="search_keywords" value="<?php
if (isset($search_results->rows_results_found) && isset($_POST['search_requested'])) {
print strip_tags($_POST['search_keywords']);
}
?>"><input type="submit" value="Search">
</form>
<form action="" method=get>
<input type=text id=se>
<?php
if($_GET != null){
$sekw = $_GET ['se'];
$sql = //the query like='$sekw' limit=100;
?>
<input type=submit>
</form>
A simple code.
Your problem is when you send the form, it does save the keywords until the second send.
change your method from post to get. also i would advice you to use a framework for easy and fast coding. some include symfony2, laravel
I have a basic contact form on my website and I am trying to add the PHP ucwords() function of PHP to the form for the users first_name and last_name fields so they capitalize the first letter correctly. How would I add this to the actual HTML form?
Edit: I want these changes to be applied only after the user submits the form. I don't really care about how the user types it in. I just need someone to actually show me an example.
Like how would I add the PHP ucwords() code to this simple form?
<!DOCTYPE html>
<html>
<body>
<form action="www.mysite.com" method="post">
First name: <input type="text" name="first_name" value="" /><br />
Last name: <input type="text" name="last_name" value="" /><br />
<input type="submit" value="Submit" />
</form>
</body>
</html>
I am assuming I do something like value='<php echo ucwords() ?>' but I have no idea how?
Thanks!
When user submit the form you can access the submitted information through $_POST variable [because method="post"] of PHP and in action you have to specify the actual page where you need the submitted information to be process further
<?php
// for example action="signup_process.php" and method="post"
// and input fields submitted are "first_name", "last_name"
// then u can access information like this on page "signup_process.php"
// ucwords() is used to capitalize the first letter
// of each submit input field information
$first_name = ucwords($_POST["first_name"]);
$last_name = ucwords($_POST["last_name"]);
?>
PHP Tutorials
Assuming short tags are enabled:
$firstName = 'Text to go into the form';
<input type="text" name="first_name" value="<?=ucwords($firstName)?>" />
Otherwise as you stated
<input type="text" name="first_name" value="<?php echo ucwords($firstName); ?>" />
Assuming you wanted to do it without a page refresh, you need to use Javascript. Simplest way would be to add an onkeyup event to the input field and simulate PHP's ucwords functions, which would look something like...
function ucwords(str) {
return (str + '').replace(/^([a-z])|\s+([a-z])/g, function ($1) {
return $1.toUpperCase();
});
}
Edit: In response to your edit, if you want to get the value they sent with ucwords applied, all you need to do is $newVal = ucwords($_POST['fieldName']);
I have my form working and all of the errors and everything works.
But if you have an error, it refreshes the page and removes any text that was inserted before the submit button was clicked and you have to re-enter all of the information.
Anyway to fix this?
I think it has something to do with not using $_SERVER["PHP_SELF"] in the action of the form.
Instead I have action=""
I am doing this because the page that needs to be refreshed with the same info has a variable in its url (monthly_specials_info.php?date=Dec10) that was put there from the last page.
I tried using
<form method="post" action="'.$_SERVER["PHP_SELF"].'?date='.$date.'">
and it produced the right url. but the text was all removed anyway when form was submitted (with errors).. any ideas?
Form code:
echo ' <div id="specialsForm"><h3>Interested in this coupon? Email us! </h3>
<form method="post" action="'.$_SERVER["PHP_SELF"].'?date='.$date.'">
Name: <input name="name" type="text" /><br />
Email: <input name="email" type="text" /><br />
Phone Number: <input name="phone" type="text" /><br /><br />
Comment: <br/>
<textarea name="comment" rows="5" cols="30"></textarea><br /><br />
<input type="submit" name="submit" value="Submit Email"/>
</form></div>
<div style="clear:both;"></div><br /><br />';
and the vaildator:
if(isset($_POST['submit'])) {
$errors = array();
if (empty($name)) {
$errors[] = '<span class="error">ERROR: Missing Name </span><br/>';
}
if (empty($phone) || empty($email)) {
$errors[] = '<span class="error">ERROR: You must insert a phone number or email</span><br/>';
}
if (!is_numeric($phone)) {
$errors[] = '<span class="error">ERROR: You must insert a phone number or email</span><br/>';
}
if (!preg_match('/[A-Z0-9._%+-]+#[A-Z0-9.-]+\.[A-Z]{2,4}/', strtoupper($email))) {
$errors[] = '<span class="error">ERROR: Please Insert a valid Email</span><br/>';
}
if ($errors) {
echo '<p style="font-weight:bold;text-align:center;">There were some errors:</p> ';
echo '<ul><li>', implode('</li><li>', $errors), '</li></ul><br/>';
} else {
mail( "email#hotmail.com", "Monthly Specials Email",
"Name: $name\n".
"Email: $email\n".
"Phone Number: $phone\n".
"Comment: $comment", "From: $email");
echo'<span id="valid">Message has been sent</span><br/>';
}
}
First: you cannot trust '.$_SERVER it can be modified. Be carefull with that!
Second: you could(should?) use a hidden field instead of specifing it in the action?
But if you have an error, it refreshes
the page and removes any text that was
inserted before the submit button was
clicked and you have to re-enter all
of the information. Anyway to fix
this?
You could use ajax to fix it(I believe plain old HTML has this side-effect?).
A browser doesn't have to (p)refill a form. Some do for convenience, but you cannot rely on it.
In case you display the form again, you could set the values of the inputs like this:
$value = isset($_POST['foo']) : $_POST['foo'] : '';
echo '<input type="text" value="'. $value .'" name="foo" />';
Of course you should check and sanitize the POSTed data before including it in your HTML to not open up any XSS vulnerabilities.
If you want the form to submit to the same page, you don't need to set an action, it works without it as well. Also I'd suggest you to send the date in this way:
<input type="hidden" name="date" value="'.$date.'"/>
A part from the fact that that validator and html code has some big issues inside and things i'd change, what you are asking is: How could i make that the form compiled doesn't remove all the text from my input tags after the refresh.
Basically not knowing anything about your project, where the strings submitted goes, if they are stored in a database or somewhere else, what does that page means inside your project context i cannot write a specific script that makes submitted string remembered in a future reload of the page, but to clarify some things:
If there is a form that is defined as <form></form> and is submitted with a <input type="submit"/> (which should be enough, without giving it a name name="submit") the page is refreshed and it does not automatically remember the input your previously submitted.
To do that you have 2 choice:
Use Ajax (check Jquery as good framework for ajax), which will allow you to submit forms without refreshing the page. I choose it as first way because it is over-used by everyone and it is going to became more and more used because it is new and it works smoothly.
Make a php script that allows you to check if the input has already been submitted; in case the answer is true, then recover the values and get them in this way: <input type="text" value="<?php echo $value ?>"/>.
Also notice that you do not need of '.$_SERVER["PHP_SELF"].'?date='.$date.' since ?date='.$date.' is enough.
Browsers will not re-populate a form for you, especially when doing a POST. Since you're not building the form with fields filled out with value="" chunks, browsers will just render empty fields for you.
A very basic form handling script would look something like this:
<?php
if ($_SERVER['REQUEST_METHOD'] = 'POST') {
# do this only if actually handling a POST
$field1 = $_POST['field1'];
$field2 = $_POSt['field2'];
...etc...
if ($field1 = '...') {
// validate $field1
}
if ($field2 = '...') {
// validate $field2
}
... etc...
if (everything_ok) {
// do whatever you want with the data. insert into database?
redirect('elsewhere.php?status=success')
} else {
// handle error condition(s)
}
} // if the script gets here, then the form has to be displayed
<form method="POST" action="<?php echo $_SERVER['SCRIPT_NAME'] ?>">
<input type="text" name="field1" value="<?php echo htmlspecialchars($field1) ?>" />
<br />
<input type="text" name="field2" value="<?php echo htmlspecialchars($field2) ?>" />
etc...
<input type="submit" />
</form>
?>
Notice the use of htmlspecialchars() in the last bit, where form fields are being output. Consider the case where someone enters an html meta-character (", <, >) into the field. If for whatever reason the form has to be displayed, these characters will be output into the html and "break" the form. And every browser will "break" differently. Some won't care, some (*cough*IE*cough*) will barf bits all over the floor. By using htmlspecialchars(), those metacharacters will be "escaped" so that they'll be displayed properly and not break the form.
As well, if you're going to be outputting large chunks of HTML, and possibly embedding PHP variables in them, you'd do well to read up on HEREDOCs. They're a special construct that act as a multi-line double-quoted string, but free you from having to do any quote escaping. They make for far more readable code, and you don't have to worry about choosing the right kind of quotes, or the right number of quotes, as you hop in/out of "string mode" to output variables.
first, a few general changes:
change
<form method="post" action="'.$_SERVER["PHP_SELF"].'?date='.$date.'">
to
<form method="post" action="'.$_SERVER["PHP_SELF"].'">
<input type="hidden" name="data" value="'.$date.'" />
the answer to your original question:
set each input elements value attribute with $_POST['whatever'] if array_key_exists('whatever', $_POST);
For example: the name field
<input type="text" name="name" value="<?php echo array_key_exists('name', $_POST) ? $_POST['name'] : ''; ?>" />
Is to possible to POST a string in the form field and get converted string result in the same form field?
I use the code:
<?php
$string='';
if (isset($_POST['string']))
$string=$_POST['string']
if (isset($_POST['DoStuff']))
{
$string = doStuffWithThisString($string);
}
if (isset($_POST['DoOtherStuff']))
{
$string = doOtherStuffWithThisString($string);
}
?>
<form action="" method="post">
<!-- blank action attribute will post form to the current page-->
<input type="text" value="<?=$string?>" name="string" />
<!-- <?=$string?> is the same as <?php echo $string; ?> -->
<input type="submit" value="Do Stuff" name="DoStuff" />
<input type="submit" value="Do Other Stuff" name="DoOtherStuff" />
</form>
but get the result above form field...
Are you sure short tags are enabled?
See: http://php.net/manual/en/ini.core.php
If they are not, just use:
<?php echo $string; ?>
I don't see why it wouldn't work.
Depending on the browser, the button names may not be "DoStuff" and "DoOtherStuff". For example, in IE it will be $_POST['DoStuff_x'] and $_POST['DoStuff_y'].
do a print_r($_POST); to see what the form data is being posted as.
If you would use the same name in the submit fields, upon page reload in $_POST['name'] you would get the value you clicked on.
I think that's the solution to the issue, but can someone confirm this ?