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In my url i'm passing id's like this
localhost/?id=1,2,3,4,5,6,7,8,9
I was wondering if there is a better way / simpler way to validate each id without using a loop?
if (isset($_GET['id']) && !empty($_GET['id']))
{
$str = explode(',', $_GET['id']);
for($ids = 0; $ids < sizeof($str); $ids++)
{
if (!ctype_digit($str[$ids]))
{
echo 'error';
break;
}
}
}
You could just test the string with a simple regular expression, eg
if (preg_match('/^(\d+,)*\d+$/', $_GET['id']) == 0) {
throw new Exeption('error');
}
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I want to do something that I'm sure is simple but I can't gather how to do it from the documentation.
All I want to do is:
function something() {
// Do some stuff with cURL
set $object->name;
set $object->corporation;
// some if statement
set $object->other; //if cURL finds "other" exists
return $object;
}
And be able to do this:
$result = something();
$name = $result->name;
etc.
Does anyone know the best way to do this? I use procedural style and have very little know-how with objects hence I'm trying to learn.
function foo(){
$result = new stdClass();
$result->name = "Joe";
$result->other = "bar";
return $result;
}
$object = foo();
echo $object->name; // Should display "Joe"
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I'm fairly new to PHP so I was wondering whether or not you could have to 'commands' in an if statement, like:
$value = 1;
$values = 2;
if ($value == '1' & $values == '2') {
do something
} else {
do something else
}
Would that work? I probably have the syntax wrong however you get the gist. Haha
Thanks for the help.
if you are new to use conditional operators read first before implement.
http://php.net/manual/en/language.operators.comparison.php
$value = 1;
$values = 2;
if ($value == '1' && $values == '2') {
// do something
} else {
// do something else
}
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I have a $_POST which contain following data
$_POST['survey_que1']
$_POST['survey_que2']
$_POST['survey_que3']
....
so on.
I have to get a count of occurrence of survey_que from $_POST.
Any Ideas please.
Restructure your data.
<input type="text" name="survey_que[]" />
This will result in $_POST['survey_que'] being an array of passed values, which you can easily use count() to get the total count.
try this
$i=0;
foreach ($_POST as $name => $val)
{
if(strpos($name,'survey_que') !== false && $name != "survey_que")
$i++;
}
echo "No of times survey_que occured in $_POST[] is ".$i;
EDIT
#shri in your code if survey_que2 is not set and survey_que3 is set then your code fails.
So try this workaround which covers all worst cases also
$i=0;
foreach ($_POST as $name => $val)
{
if(strpos($name,'survey_que') !== false && $name != "survey_que")
{
$key=explode("survey_que",$name);
if(sizeof($key) == 2 && is_numeric($key[1]) && $key[0] == "")
{
$i++;
}
}
}
echo "No of times survey_que occured in $_POST[] is ".$i;
Serialize $_POST and use "substr_count" for counting ocurrences
$how_many = substr_count(serialize($_POST), $search_string));
It's the easiest way I find but will count this text even if it's not a $_POST key value
This is working for me exactly i want.
$i = 1;
while (isset($_POST['survey_que' . $i])) {
$i++;
}
echo $i-1;
Thanks everyone for quick support.
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Im wondering if i can do and/or together. I'm trying to make a code that checks if both variables are wrong or if only one of them is wrong and the other one is right then I want to show a message like: "one of the "variables" are wrong.
Can anyone help me out here?
In addition to Tim Whites answer, if you don't want it nested, you could also use:
if($a == false AND $b == false) { echo "Both variables are false"; }
elseif($a == false OR $b == false) { echo "One variable is false"; }
if ($a==false OR $b==false) {
if($a==false AND $b==false) { echo "Both variables are false"; }
else { echo "On of the variables is false"; }
}
Something like that will do.
You could just use multiple IF statements, to check if 1 variable is wrong or both are wrong. Like:
if ($variable1==false && $variable2==false){
}
else{
if ($variable1==false || $variable2==false){
}
}
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I'm trying to define a link based of a $_GET variable, but it's saying there's an error on a line that doesn't exist...
<?php
if(isset($_GET['ref'])){
if(!empty($_GET['ref']))
{
$ref = $_GET['ref'];
}
?>
<?php
if ($ref != "") {
$link = "http://site.com/page.php?ref=$ref";
} else {
$link = "http://site.com/page.php";
}
?>
Anyone see what's up? I was pretty sure it was fine.
I've tried it multiple different ways, with isset etc... same result.
You are missing a closing }:
if(isset($_GET['ref'])){
if(!empty($_GET['ref']))
{
$ref = $_GET['ref'];
}
}
By the way, this code is quite redundant. empty() will also check whether the variable is set, so you don't need isset().
You can also use the ternary operator, which is for cases like this:
$ref = empty($_GET['ref']) ? null : $_GET['ref'];
And later check with:
if (!is_null($ref)) {
//whatever
}
Otherwise, in your code, when execution reaches if ($ref != "") {, the variable $ref might not even exist - this will throw an E_NOTICE, which you might not even see, depending on your settings.