look at this simple script please
$c1 = $_GET[c1];
$c2 = $_GET[c2];
$c3 = $_GET[c3];
$c4 = $_GET[c4];
$c5 = $_GET[c5];
for($i = 1;$i <=5;$i++)
{
echo $c{$i};//or something else here :/
}
how can i print tha values of variables?
Thanks
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2If you are defining the variables, use an array instead. Could someone explain why so many are suggesting alternatives to a plain-old array?Kieren Johnstone– Kieren Johnstone2010-07-23 12:34:14 +00:00Commented Jul 23, 2010 at 12:34
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possible duplicate of Can I use a generated variable name in PHP?outis– outis2010-10-01 04:04:58 +00:00Commented Oct 1, 2010 at 4:04
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6 Answers
You can see on php.net some good examples in the variable page. Read that and take a look at the examples.
Also, below is your piece of code fixed so it can work:
<?php
$c1 = $_GET[c1];
$c2 = $_GET[c2];
$c3 = $_GET[c3];
$c4 = $_GET[c4];
$c5 = $_GET[c5];
for($i = 1;$i <=5;$i++)
{
echo ${"c".$i};
}
answered Jul 23, 2010 at 12:31
Bogdan Constantinescu
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3 Comments
Hammerite
This is not a good thing to advise the guy to do. This is a case where arrays are the most appropriate answer; why tell him to use variable variables?
Bogdan Constantinescu
He wanted variable variables (probably because in
$c1, $c2 etc checks the $_GET contents. If he would have asked for other solutions, I would suggest others, but it seems to me this questions is about variable variables.
Matchu
This answer is more correct, but recommending arrays is better. In cases like these, I feel that the best answers are a merging of yours and @Kieren Johnstone: they offer the solution to the question at hand, but also make a point of saying that it's really not good practice. Regardless, +1 to you both xP
You should use an array rather than individual variables.
For reference:
answered Jul 23, 2010 at 12:33
Kieren Johnstone
42.1k16 gold badges100 silver badges151 bronze badges
Comments
If these values are closely related, consider changing their name attribute in your HTML/form.
HTML:
<form>
<input type="text" name="c[]" />
<input type="text" name="c[]" />
...
</form>
PHP:
<?php
if(!empty($_GET['c'])) {
foreach($_GET['c'] as $c) {
echo $c;
}
}
?>
Comments
Here's a better way of doing it, using Arrays, rather than individual variables, which works easier and more efficiently.
<?php
$array['c1'] = $_GET['c1'];
$array['c2'] = $_GET['c2'];
$array['c3'] = $_GET['c3'];
$array['c4'] = $_GET['c4'];
$array['c5'] = $_GET['c5'];
for ($i=1; $i>=5; $i++) {
echo $array['c' . $i];
}
?>
Comments
Perhaps PHP variable variables is what you are looking for.
$i = "c1";
print $$i;
I'll leave it to you to figure out how to construct correct values for 'i'.
Comments
This should work..
foreach($_GET as $id => $value){
echo $value;
}
even though this prints out every $_GET.