Need to capture two variables via POST.
If they are different integers, save $mensalidade = 4 and a integer and any other state save $mensalidade=8.
I try this but dont work..
if (is_int($_POST['linha_ida']) != is_int($_POST['linha_volta'])) {
$mensalidade= $_POST['mensalidade']=4;
} else {
$mensalidade= $_POST['mensalidade']=8;
}
Broke a little more head and now it's perfect!
Thanks to all
The code looked like this
if($linha_ida === $linha_volta || preg_match( '/[A-Z]/' , $linha_volta )|| preg_match( '/[A-Z]/' , $linha_ida )){
$mensalidade= $_POST['mensalidade']=8;
} else{
$mensalidade= $_POST['mensalidade']=4;
}
Just use the (int) parser to convert the string to an integer.
if ((int)$_POST['linha_ida']) != (int)($_POST['linha_volta']) && is_int($_POST['linha_ida']) && is_int($_POST['linha_volta']) {
$mensalidade= $_POST['mensalidade']=4;
} else {
$mensalidade= $_POST['mensalidade']=8;
}
Taken from the Question comments from caCtus
caCtus:
is_int() returns true or false if the parameter is an integer or not. If you compare is_int($iamaninteger) to is_int($iamanintegertoo), you compare true and true, not your variables' values.
if (is_int($_POST['linha_ida']) && is_int($_POST['linha_volta']) && $_POST['linha_volta'] != $_POST['linha_ida']) {
$mensalidade= $_POST['mensalidade']=4;
} else {
$mensalidade= $_POST['mensalidade']=8;
}
Related
I am checking if two values are null. If both are null I want to return false, if either or both are not null, I want to return true.
My current code returns true only when both are not null but I want it to return true when either or not null.
// check if both null
if (!isset($myarray['dataone'], $myarray['datatwo']))
{
echo 'false';
);
} else {
echo 'true';
);
}
return $emptytabs;
For that you can use relational operators. AND (&&) OR (||)
By using AND (&&) operators.
if ( (!isset($myarray['dataone']) || (!isset$myarray['datatwo'] ))
{
echo 'false';
}
else
{
echo 'true';
}
By using OR ( || ) operators.
if (isset($myarray['dataone'] && isset$myarray['datatwo'])
{
echo 'false';
}
else
{
echo 'true';
}
// check if both null
if ( !isset($myarray['dataone']) && !isset($myarray['datatwo'])) {
echo 'false';
} else {
echo 'true';
}
// check if one or both are null
if ( !isset($myarray['dataone']) || !isset($myarray['datatwo'])) {
echo 'false';
} else {
echo 'true';
}
// check if both null
if ( !isset($myarray['dataone'], $myarray['datatwo']) )
{
echo 'false';
} else {
echo 'true';
}
return $emptytabs;
this approach you provided is totally true , but it only return true if all the provided parameters are set according to php documentations .
so your code should works correctly . except you have unwanted parentheses that should deleted
The simplest way is to use the OR (||) operator. You want to show 'true' if one thing is set OR another thing is set. Just say that with code.
if ( isset($myarray['dataone']) || isset($myarray['datatwo']) ) {
echo 'true';
} else {
echo 'false';
}
Using the AND operator adds pointless complexity by checking that both of the two things are not set in order for it to show 'false'. That's not an intuitive way to think about it, so it doesn't make sense to write the code that way.
DISCLAIMER: This answer is opinionated.
Here is my sample code:
$issue_id = $_POST['issue_id'];
if(!empty($issue_id)){
echo 'true';
}
else{
echo 'false';
}
If I pass 0 to $_POST['issue_id'] by form submitting then it echo false. Which I want is: Condition will be true if the following conditions are fulfilled:
1. true when I pass any value having 0.
2. false when I don't pass any value. i.e: $_POST['issue_id'] is undefined.
I also tried this:
if(!isset($issue_id)){
echo 'true';
}
else{
echo 'false';
}
if(!empty($issue_id) || $issue==0){
echo 'true';
}
else{
echo 'false';
}
The last one is okay, meaning if I pass any value having ZERO then it will echo true. But it will also echo true if I don't pass any value. Any idea?
The last is okay, meaning if I pass any value having ZERO then it echo true. But it also echo true if I don't pass any value. Any idea?
if (isset($_POST["issue_id"]) && $_POST["issue_id"] !== "") {
}
please notice I used !== not !=. this is why:
0 == "" // true
0 === "" // false
See more at http://php.net/manual/en/language.operators.comparison.php
also if you are expecting number you can use
if (isset($_POST["issue_id"]) && is_numeric($_POST["issue_id"])) {
}
since is_numeric("") returns false
http://php.net/manual/en/function.is-numeric.php
Alternatively if you expect number good option is filter_var
if (isset($_POST["issue_id"]) {
$issue_id = filter_var($_POST["issue_id"], FILTER_VALIDATE_INT);
if ($issue_id !== false) {
}
}
since filter_var("", FILTER_VALIDATE_INT) will returns false and filter_var("0", FILTER_VALIDATE_INT) will return (int) 0
http://php.net/manual/en/function.filter-var.php
if(isset($_POST['issue_id'])) {
if($_POST['issue_id'] == 0) {
echo "true";
}
else {
echo "false";
}
}
When you get data from a form, remember:
All text boxes, whether input or textarea will come as strings. That includes empty text boxes, and text boxes which contain numbers.
All selected buttons will have a value, but buttons which are not selected will not be present at all. This includes radio buttons, check boxes and actual buttons.
This means that $_POST['issue_id'] will be the string '0', which is actually truthy.
If you need it to be an integer, use something like: $issue_id=intval($_POST['issue_id']);
#Abdus Sattar Bhuiyan you can also full fill your two condition like below one:
<?php
$_POST["issue_id"] = "0";
$issue_id = isset($_POST['issue_id']) ? (!empty($_POST['issue_id']) || $_POST['issue_id'] === 0 || $_POST['issue_id'] === "0") ? true : false : false;
if($issue_id){
echo 'true';
}
else{
echo 'false';
}
i got into some trouble by using OR if one condition is true and the other false.
in my constillation right now it is always only the second condition token.
if($num_rows === '0' OR $_GET['id'] !== $_SESSION['UserID'])
{ echo "show me something"; }
else
{ show nothing; }
i get only always 'show nothing'.
Note that === is strict comparison. I think the following:
$num_rows === '0'
should rather be:
$num_rows == 0
$num_rows is presumably an integer and not a string (a piece of text).
Related: PHP == vs === on Stack Overflow
Watch out with the second comparison, too:
$_GET['id'] !== $_SESSION['UserID']
Here, it's probably better to use != in favor of !== as well. $_GET is generally read as string, so even something like ?id=5 will return as string "5" and not as integer 5
Here's a quick test to illustrate:
if (isset($_GET['id'])) {
echo '<h2>Comparison with == 5</h2>';
var_dump( ($_GET['id'] == 5) );
echo '<h2>Comparison with == "5"</h2>';
var_dump( ($_GET['id'] == "5") );
echo '<h2>Comparison with === 5</h2>';
var_dump( ($_GET['id'] === 5) );
echo '<h2>Comparison with === "5"</h2>';
var_dump( ($_GET['id'] === "5") );
}
else {
echo 'Please set an ?id to test';
}
This will output (notice the third item is false) the following with ?id=5:
Comparison with == 5
boolean true
Comparison with == "5"
boolean true
Comparison with === 5
boolean false
Comparison with === "5"
boolean true
Probably because you use absolute equality with a string.Mysli_num_rows returns an int.
http://php.net/manual/en/language.operators.comparison.php
Equal and of the same type
You dont need to use === as it is a strict comparison and $num_rows is probably an int Try this:-
if($num_rows == 0 OR $_GET['id'] != $_SESSION['UserID'])
$_GET['id'] will provide you a string. You may chech the manual for details
To be really correct, need something like this:
if ($num_rows === FALSE) {
echo 'db resource/link gone';
}
elseif ($num_rows === 0 || intval($_GET['id']) !== intval($_SESSION['UserID'])) {
echo 'no db result or id mismatch';
}
elseif (intval($num_rows) > 0 && intval($_GET['id']) === intval($_SESSION['UserID'])) {
echo 'everything good';
}
else {
echo 'something unhandled went wrong';
}
thanks for all the answers. i got it to work. i change the order and the opreator to what you've suggested.
i made it like this:
if($num_rows > 0 OR $_GET['id'] == $_SESSION['UserID']) { echo "show nothing"; }
else { show me some stuff }
so thanks again for all the help. :)
I have string $a,$b,$c
I know if all of them not null express in this way:
if($a!="" && $b!="" && $c!="")
But if either 2 of them not null then go into the true caluse
if($a!="" && $b!="" && $c!=""){
** do the things here **
}else if(either 2 are not null){
**do another things here**
}
How to express it?
I would write a simple function like this to check:
function checkInput($var)
{
$nulls=0;
foreach($var as $val)
{
if(empty($val))
{
$nulls++;
}
}
return $nulls;
}
Then access it like this:
$inputs=array($a, $b, $c.... $z);
$nullCount=checkInput($inputs);
if($nullCount==0)
{
// All nulls
}
if($nullCount>2)
{
// More than 2 nulls
}
or for an one-off test, just pop the function into the actual if statement like this:
if(checkInput($inputs)>2)
{
// More than 2 nulls...
}
etc etc. You can then use the one function to check for any number of nulls in any number of variables without doing much work - not to mention change it without having to rewrite a long if statement if you want to modify it.
Other answers are good, but you can expand this to easily handle more variables:
$variables = array($a, $b, $c, $d, ....);
$howManyNulls = 0;
foreach($variables as $v){
if($v == ''){
$howManyNulls++;
}
}
if($howManyNulls == count($variables) - 2){
// do stuff
}
you can try this
if($a!="" && $b!="" && $c!="")
{
** do the things here **
}
else if(($a!="" && $b!="") || ($b!="" && $c!="") || ($a!="" && $c!=""))
{
**do another things here**
}
Try:
if($a!="" && $b!="" && $c!=""){
** do the things here **
}else if(($a!="" && $b!="") || ($a!="" && $c!="") || ($b!="" && $c!="")){
**do another things here**
}
$var[] = empty($a) ? 0:$a;
$var[] = empty($b) ? 0:$b;
$var[] = empty($c) ? 0:$c;
$varm = array_count_values($var);
if ($varm[0] === 0) {
//Code for when all aren't empty!
} elseif ($varm[0] === 1) {
//Code for when two aren't empty!
}
N.B; You may need to replace the 0 for a string/integer that will never crop up, if your variables are always strings or empty then 0 will do for this. The method for using bools within this would require more code.
$nullCount = 0
if($a!=""){ ++$nullCount; }
if($b!=""){ ++$nullCount; }
if($c!=""){ ++$nullCount; }
if($nullCount == 3){ // all are null
// do smth
}else if($nullCount == 2){ // only two are null
// do other
}
Just for fun, here's something potentially maintainable, should the list of arguments increase:
function countGoodValues(...$values) {
$count = 0;
foreach($values as $value) {
if($value != "") {
++$count;
}
}
return $count;
}
$goodValues = countGoodValues($a, $b, $c); // Or more... or less
if($goodValues == 3) {
// Do something here
}
else if($goodValues == 2) {
// And something else
}
Reference for the ... construct (examples #7 and #8 in particular) are available on php.net.
You can use double typecasting (to boolean, then to number) in conjunction with summing:
$count = (bool)$a + (bool)$b + (bool)$c;
if ($count == 3)
// ** do the things here **
else if ($count == 2)
//**do another things here**
There is also possible such solution:
<?php
$a= 'd';
$b = 'a';
$c = '';
$arr = array( (int) ($a!=""), (int) ($b!=""), (int) ($c!=""));
$occ = array_count_values($arr);
if ($occ[1] == 3) {
echo "first";
}
else if($occ[1] == 2) {
echo "second";
}
If you have 3 variables as in your example you can probably use simple comparisons, but if you have 4 or more variables you would get too big condition that couldn't be read.
if (($a!="") + ($b!="") + ($c!="") == 2) {
// two of the variables are not empty
}
The expression a!="" should return true (which is 1 as an integer) when the string is not empty. When you sum whether each of the strings meets this condition, you get the number of non-empty strings.
if (count(array_filter([$a, $b, $c])) >= 2) ...
This is true if at least two of the variables are truthy. That means $var == true is true, which may be slightly different than $var != "". If you require != "", write it as test:
if (count(array_filter([$a, $b, $c], function ($var) { return $var != ""; })) >= 2) ...
if($a!="" && $b!="" && $c!="") {
echo "All notnull";
} elseif(($a!="" && $b!="") || ($b!="" && $c!="") || ($a!="" && $c!="")) {
echo "Either 2 notnull";
}
I'm trying to make an if statement with 2 conditions. One that checks if one variable is NOT present & does NOT matches the word "good2go" and the other that checks to make sure "body" variable is present. I'm trying to trip the error message here. Here is what I have and what I've tried, and none of it seems to work.
if (stripos($_POST['check'], 'good2go') == FALSE && $_POST['body']) {
$error = true; }
if (!$_POST['check'] == 'good2go' && $_POST['body']) {
$error = true; }
if (!stripos($_POST['check'], 'good2go') && $_POST['body']) {
$error = true; }
if ((!stripos($_POST['check'], 'good2go')) && $_POST['body']) {
$error = true; }
How do I get this to work?
here's the entire code of contact_us.php this has the validation code and the email code.
$error = false;
if (isset($_GET['action']) && ($_GET['action'] == 'send')) {
// Winnie the pooh check
//$t = tep_db_prepare_input($_POST['verify']);
if (!isset($_POST['check']) && !$_POST['check']=='good2go' && isset($_POST['body'])) {
$error = true;
} else { // Winnie the pooh Check
$name = tep_db_prepare_input($_POST['name']);
$email_address = tep_db_prepare_input($_POST['email']);
//IP recorder start
$ipaddress = $_SERVER["REMOTE_ADDR"];
$ip = "\n\nIP: " . $ipaddress;
$content = "\n\nName: ".$name."\n\nComments: ".$_POST['enquiry'];
$product = tep_db_prepare_input($_POST['product']);
if ($product) {
$product_text = "\n\nProduct Interest: ".$product; }
$content_ip = $content . $product_text. $ip;
$enquiry = tep_db_prepare_input($content_ip);
//IP recorder end
}
// BOF: Remove blank emails
// if (tep_validate_email($email_address)) {
// tep_mail(STORE_OWNER, STORE_OWNER_EMAIL_ADDRESS, EMAIL_SUBJECT, $enquiry, $name, $email_address);
// tep_redirect(tep_href_link(FILENAME_CONTACT_US, 'action=success'));
// } else {
// $error = true;
// $messageStack->add('contact', ENTRY_EMAIL_ADDRESS_CHECK_ERROR);
if (! tep_validate_email($email_address)) {
$error = true;
$messageStack->add('contact', ENTRY_EMAIL_ADDRESS_CHECK_ERROR);
}
if ($enquiry == '') {
$error = true;
$messageStack->add('contact', ENTRY_EMAIL_CONTENT_CHECK_ERROR);
}
if ($error == false) {
tep_mail(STORE_OWNER, STORE_OWNER_EMAIL_ADDRESS, EMAIL_SUBJECT, $enquiry, $name, $email_address);
tep_redirect(tep_href_link(FILENAME_CONTACT_US, 'action=success'));
// EOF: Remove blank emails
}
}
Solution to your updated problem:
if (!isset($_POST['check']) || !$_POST['check']=='good2go' || !isset($_POST['body'])) {
$error = true;
}
The reason for the pipes vs ampersands is that you want to throw an error if ANY of the fields has issue. Also, you want to check if body is NOT set vs IS set. Glad this worked out for you!
and the other that checks to make sure "body" variable is not present.
if(stripos($_POST['check'], "good2go") !== false && !isset($_POST['body'])){
//code here
}
According to PHP docs regarding the stripos function:
This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.
So you need to change the first line to:
// Doing stripos checks you MUST use === (not ==)
if (stripos($_POST['check'], 'good2go') !== FALSE && $_POST['body']) {
$error = true; }
And to check if there is no $_POST['body'] you can change the above to:
if (stripos($_POST['check'], 'good2go') !== FALSE && (!isset($_POST['body'])) {
-- Update --
According to your comment, you need $_POST['check'] to equal 'good2go', then you shouldn't be using stripos as it will check for the existence of good2go regardless if it's exactly equal, or part of a string; 'wow this hamburger is good2go'.
So I would change the conditional to:
if (((isset($_POST['body'])) && (strlen($_POST['body']) > 0)) && ((!isset($_POST['check'])) || ($_POST['check'] !== 'good2go'))) {
// Post body has a value and Post check DOES NOT equal good2go, someone is hax0rin!
}
You may want to read up on Cross-site request forgery as it seems right inline with what you are working on.
One that checks if one variable is present & matches the word "good2go"
isset($_POST['check']) AND $_POST['check'] == 'good2go'
and the other that checks to make sure "body" variable is not present.
!isset($_POST['body'])
so, just put them together
if (isset($_POST['check']) AND $_POST['check'] == 'good2go' AND !isset($_POST['body'])) {
$error = true;
}
try this:
if(!empty($_POST['check']) && $_POST['check']=='good2go' && empty($_POST['body'])) { $error=true; }
Consider using empty instead of isset if your $_POST['body'] can be present with an empty value.
No need for all those unneeded functions. What you are trying to achieve is:
if (isset($_POST['check']) && $_POST['check']=='good2go' && !isset($_POST['body']) {
// your code
}
However, As per the title of the question: Use a ternary statement. Syntax is as such
$var = <condition> ? <true> : <false>;