Setting multiple if conditions in php

Question

I am currently making a self-processing form to display products that allows users to enter a quantity. I will then save the quantity in

$_POST['qty_entered']

when the users press the submit button. However, I also have an if statement to ensure that the users entered a valid quantity

    if (is_numeric($_POST['qty_entered'][0]) && is_int($_POST['qty_entered'][0]) && $_POST['qty_entered'][0] > 0) {
    print "'<tr><td>' test '</td>'";
}
else {
    $errors = true}

Then want to print a table with the invoice on the same page, only after the submit button is pressed and if the user entered a valid quantity. However, this code is not working:

if (array_key_exists ('submit_button', $_POST)) && $errors = false{
print "Invoice";

I also have a code at the beginning of the form to set $errors to false, and if $errors is true, it will print an error message. However, it is also not working because it doesn't display the error message when I type rubbish that would trigger the if statement such as "agfasgs" or "-1"

        $errors = false;
    if ($errors == true) {
print "Please enter postive whole numbers for quantity <br><br>";}

Thank you for the help!

Rotimi · Accepted Answer · 2017-10-09 02:33:12Z

1

This line does not have the brackets properly inserted. Also you need == or ===(This enforces strict check) What you have currently assigns the variable. You need to check.

The === operator is supposed to compare exact content equality while the == operator would compare semantic equality

if (array_key_exists ('submit_button', $_POST)) && $errors = false{//This should have thrown an error though(FATAL)

It should be

if (array_key_exists ('submit_button', $_POST) && $errors == false){

Also, FYI, shouldnt this line

if (is_numeric($_POST['qty_entered'][0]) && is_int($_POST['qty_entered'][0]) && $_POST['qty_entered'][0] > 0) {

Be this: ?

if (is_numeric($_POST['qty_entered']) && is_int($_POST['qty_entered']) && $_POST['qty_entered'] > 0) {//access the post data properly

edited Oct 9, 2017 at 2:33

answered Oct 9, 2017 at 2:17

Rotimi

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4 Comments

Gary Lee Over a year ago

I have 5 quantities in the $_POST['qty_entered'] which is why I want it to refer to the first quantity, which is [0]. However the == fixed the fatal error that I was receiving. Thanks! However I still have the problem where it's not setting the $errors = TRUE when an error is found in the quantity

Gary Lee Over a year ago

I am still stuck on the last part of the code where it sets $errors = TRUE if the if conditions aren't met.. var_dumping $errors returns false even though I typed in something weird such as -1 or sagsad

Rotimi Over a year ago

try remove the is_int condition

Gary Lee Over a year ago

Actually, I have $errors at the beginning of the code so that it does not execute anything and just print an error message if those conditions aren't met.. So var_dumping $errors at the beginning returns false, however var_dumping $errors at the end after the if conditions returns true.. Why isn't it making the one at the beginning true as well since I thought a self-processing form would run itself again and it should change that boolean to true if there is an error

Curtis Mattoon · Accepted Answer · 2017-10-09 02:19:55Z

0

php if (array_key_exists ('submit_button', $_POST)) && $errors = false{ print "Invoice";

is not valid PHP: Your parens are wrong, and you're assigning false to $errors (you want ==, not =)

if (array_key_exists('submit_button', $_POST) && $errors == false) {

answered Oct 9, 2017 at 2:19

Curtis Mattoon

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