Hi I have a list of values named:
$value1
$value2
$value3
...
and I'd like to assign each value to an array element; something like:
$my_array[1]=$value1;
$my_array[2]=$value2;
$my_array[3]=$value3;
How can I do this using a for cycle? The array is not a problem but I can't figure out how to write some code for the value, it should be something like:
for($i=1; $i<=10000; $i++)
{
$my_array[$i]=$value$i;
}
Try this:
for ($i=1; $i<=10000; $i++) {
$val_name = "value" . $i;
$my_array[$i]=$$val_name;
}
You are almost there:
for($i=1; $i<=10000; $i++)
{
$my_array[$i] = $value;
}
Or this, if you want to append the counter as well:
for($i=1; $i<=10000; $i++)
{
$my_array[$i] = $value . $i;
}
What you are looking for are the {}.
$my_array[$i]=${'value'.$i};
for ($i = 1; isset(${"value$i"}); $i++) {
$my_array[$i] = ${"value$i"};
}
This syntax is known as variable variables.
You can use the $$ syntax:
for($i = 1; $i <= 10000; $i++) {
$name = 'value' . $i;
$my_array[$i] = $$name;
}
Related
I am in too much trouble. I need below type of array:-
$val = "abc";
$arr1["besk"] = $val
$arr2["besk"] = $val
.
.
$arr15["besk"] = $val
I tried below:-
for($i = 1; $i<16; $i++)
{
$arr.$i["besk"] = $val
}
here I've $val. so not to worry on that. But array is not properly creating. Any help would be appreciated.
first define the array as string
like
$arr = 'arr';
then use the foreach
like
for($i = 1; $i<16; $i++)
{
${$arr.$i}["besk"] = $val;
}
You need to use variable variables (not recommended)
for($i = 1; $i<16; $i++)
{
${"arr".$i}["besk"] = $val
}
EDIT : #CBroe is right about his comment, you should use an array instead. So the best solution would be to create a two dimensional array like so :
$arr = [];
for($i = 0; $i<15; $i++)
{
$arr[$i]["besk"] = $val
}
The only difference is your array indexes start from 0 now and if you want to have the third value of your array you need this command $arr[2]["besk"]
it is very simple use this:
for($i = 1; $i<16; $i++)
{
${$arr.$i}["besk"] = $val
}
Use this approach:
for($i = 1; $i<16; $i++)
{
${$arr.$i}["besk"] = $val;
}
add new variable
$val = "abc";
$arrName = "arr"; //this one
$arr1["besk"] = $val
$arr2["besk"] = $val
.
.
$arr15["besk"] = $val
and to call it
for($i = 1; $i<16; $i++)
{
${$arrName.$i}["besk"] = $val
}
ps. you did not create array, you just create 15 array variable with 1 index("besk" index)
I have the following code:
$extraPhoto_1 = get_field('extra_photo_1');
$extraPhoto_2 = get_field('extra_photo_2');
$extraPhoto_3 = get_field('extra_photo_3');
$extraPhoto_4 = get_field('extra_photo_4');
But I would like to rewrite it with a for loop, but I can't figure out how to put a variable within the value field. What I have so far is:
for($i = 1; $i < 5; $i++) {
${'extraPhoto_' . $i} = get_field('extra_photo_ . $i');
}
I've tried with an array like this:
$myfiles = array();
for ($i = 1; $i < 5; $i++) {
$myfiles["$extraPhoto_$i"] = get_field('extra_photo_ . $i');
}
Nothing seems to fix my problem. I'v searched on the PHP website (variable variable).
There is some bug in your code which not allowing. Use 'extra_photo_'. $i instead of 'extra_photo_. $i'
for($i = 1; $i < 5; $i++) {
$extraPhoto_.$i = get_field('extra_photo_'. $i);
}
You can build an array as defined below and than just call extract($myfiles) to access them as variables.
Again your syntax for the get field is incorrect you should append $i after the quotes.
$myfiles = array();
for ($i = 1; $i < 5; $i++) {
$myfiles["extraPhoto_".$i] = get_field('extra_photo_'.$i);
}
extract($myfiles);
If you want to create dynamic variable, use below code
for ($i = 1; $i < 5; $i++) {
${'extraPhoto_'.$i} = $_POST['extra_photo_'.$i];
}
if you want to assign variables to array use below code.
for ($i = 1; $i < 5; $i++) {
$myfiles["extraPhoto_$i"] = $_POST['extra_photo_'.$i];
/// $myfiles["extraPhoto_$i"] = get_field('extra_photo_'.$i);
}
and than to see if values are assign to new array or not, you can use below code.
echo "<pre>";print_r($myfiles);echo "</pre>";
Okay so i am trying to retrieve the object value iterating through a for loop.
Manually it looks like this:
echo $game->stats->item0;
echo $game->stats->item1;
...
I want to do it something like this:
for($i = 0; $i < 6; $i++) {
echo $game->stats->item.$i;
}
The above however just returns the value of $i. How can i return the actual object value?
Thanks
Basically, your statement should be like this:
echo $game->stats->{'item'.$i}
Regards,
Instead of item.$i, use {"item$i"}.
for($i = 0; $i < 6; $i++) {
echo $game->stats->{"item$i"};
}
Another way you can do it is to set a variable to be equal to 'item' . $i.
for($i = 0; $i < 6; $i++) {
$item = 'item' . $i;
echo $game->stats->$item;
}
I was wondering if it is possible to create unique variables in a for loop using PHP. I tried the following code but it didn't work:
$level_count = 6
for ($i=1; $i<=$level_count; $i++) {
$level_ + $i = array();
}
I would like to end up with the variables $level_1, $level_2, $level_3, $level_4, $level_5 and $level_6. How would I achieve this?
$level_count = 6
for ($i=1; $i<=$level_count; $i++) {
$l = "level" . $i;
$$l = array();
}
But Zerkms is right...
$arr = array(array(),array(),array(),array(),array(),array());
It's much easier if you use arrays for this. Try this one-liner:
$level_count = 6;
$array = array_fill_keys(array_map(function($index) {
return 'level_' . $index;
}, range(1, $level_count)), array());
var_dump($array);
Weird thing (I have no idea why you want to use it), but, just for educational purposes...
$level_count = 6;
for ($i = 1; $i <= $level_count; $i++) {
$name = 'level_' . $i;
$$name = array();
}
I need a way to do this
for($i=1;$i<=10;$i++){
$id$i = "example" . $i;
}
notice the second line has $id$i
so for the first loop $id1 will equal example1
in the second loop $id2 will equal example2
and so on...
Thank you very much!
You can use variable variable names to do this; however, it's probably much more convenient if you just used an array:
for($i = 1, $i <= 10, $i++) {
$id[] = "example" . $i;
}
You can convert a string into a variable (the name of the variable), if you put another $ in front of it:
$str = "number";
$number = 5;
$$str = 8;
echo $number; // will output 8
So in your example, you could do it like that:
for($i = 1; $i <= 10; $i++) {
$str_var = "id".$i;
$$str_var = "example".$i;
}
It would be much better to use an array, but you could do this:
for($i=1; $i<=10; $i++){
$var ="id$i";
$$var = "example" . $i;
}
Here's what I would recommend doing instead:
$ids = array;
for($i = 1; $i <= 10; $i++) {
$ids[$i] = "example" . $i;
}
You could create an array of size $i with a name of $id, and insert each element into a different index.
for($i=1;$i<=10;$i++){
$id[$i] = "example" . $i;
}
$var = array();
for($i=1; $i<=10; $i++) {
$var['id' . $i] = 'example' . $i;
}
extract($var, EXTR_SKIP);
unset($var);
but why not use a simple array?