Default value if input field empty - php

Question

I have a search form with various field but i want to set a default into the url if the field is empty:
<input type="text" name="price-max" class="form-control" placeholder="Max Price" >
and when the form is submited my url looks something like this
search.php?location=location&category=Category&status=lease&price-max=
instead i want a default value so that when i submit the form with an empty price field the url should like.
search.php?location=location&category=Category&status=lease&price-max=999

Answer 1

(Just) Do it server-side:
$price_max = empty($_GET['price-max']) ? 999 : $_GET['price-max'];
// /\ default value
That way, when you use $price_max in your query, it will be either user input or the default value (999 - or whatever value you decide to go with).
You don't even have to mess with the url to achieve that.
The previous code is the same as:
if(empty($_GET['price-max'])){
$price_max = 999; // default value
}else{
$price_max = $_GET['price-max'];
}
Sidenotes:
You could combine the above code with trim;
There's info / example in the docs: Example #3 Assigning a default value;
You didn't show the php code, but make sure you are protected against sql-injections;
You could put your default value as placeholder in the input, just so the user 'sees' something in there.

Answer 2

If you want to put default value, you should define value in each input field.
<input type="text" value="defualt_value" name="price-max" class="form-control" placeholder="Max Price" >

Answer 3

Instead of sending the form directly, call a function to validate the form fields. In that function, check if that field is empty and then add your default value. Finally that function submits the form.

Answer 4

You just need to define feild default value
<input type="text" name="price-max" class="form-control" placeholder="Max Price" value="999">

Answer 5

1st method
Define value attribute in your input field but this will show your default value in text field
<form method = "GET" action="search.php">
<input type="text" name="price-max" class="form-control" placeholder="Max Price" value = "<?php echo $_GET['price-max'] ? $_GET['price-max'] : 999 ?>">
<input type="submit" value="submt">
if you didn't input then it will carry price-max = 999 otherwise whatever you will type
2nd Method
Use jQuery or javascript for this
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<form method = "GET" action="search.php" id="my_form">
<input type="text" name="price-max" id="price-max" class="form-control" placeholder="Max Price">
<input type="submit">
</form>
<script type="text/javascript">
$(document).ready(function() {
$("#my_form").submit(function() {
if($("#price-max").val()=="") {
$("#price-max").val('999');
}
});
});
</script>
I have added id attribute to form and price-max field

Answer 6

in controller example
public function getMessages(Request $request){
$page = request('page', 1);
$limit = request('limit', 100);
$status = request('status', 'all');
$sort = request('sort', 'asc');
$id = request('id', 'asc');
$referenceId = request('referenceId', '');
$from = request('from', '');
$to = request('to', '');
$ack = request('ack', '');
.......
}