I am trying to create/fill two multidimension arrays within a loop.
$internal_array = array();
$external_array = array();
Within a loop, I am trying fill them randomnly, so for example if, for every iteration, my variable is "internal", I'll fill internal_array otherwise external_array.
This array has three cells as shown below.
I am not sure how would I insert into my array, as an example, this is what I am trying:-
$internal_array = array("mystring1", "mynumber1", "order1");
$external_array = array("mystring4", "mynumber4", "order4");
This seems to not work for somereason.
I am hoping that by the end of loop, I'd have a multidimensional array like:-
internal_array = [0] ("mystring1", "mynumber1", "order1")
[1] ("mystring2", "mynumber2", "order2")
[2] ("mystring3", "mynumber3", "order3")
external_array = [0] ("mystring4", "mynumber4", "order4")
[1] ("mystring5", "mynumber5", "order5")
[2] ("mystring6", "mynumber6", "order6")
Any idea please?
Thanks.
In the loop with every occurrence you are re-populating the same variable over and over again $internal_array = [some_value], so it will contain the last values populated only, using $internal_array[] = [some_value] will add every item in the loop as a subsequent array member
for($i=0; $i<count; $i++){
if ($category == "internal") {
$internal_array[] = array("mystring1", "mynumber1", "order1");
}
elseif ($category == "external") {
$external_array[] = array("mystring4", "mynumber4", "order4");
}
}
You could also add them all in one shot like this:
array_push(
$internal_array,
array("mystring1", "mynumber1", "order1"),
array("mystring2", "mynumber2", "order2"),
array("mystring3", "mynumber3", "order3")
);
See array_push()
Related
So I have an array ($items) which has about 900 items in it. What I'm trying to do is, for the items that are read ($key["status"] == 1) which is about 300 items -> push those into a second array ($lifeSpanArray) with two attributes (added_date and read_date).
For some reason, when I try to push items into the lifespan array, I only have one item. Like I said, there are around 300 items that are status read - and I can dump those out, so I believe I am making a mistake with building my lifeSpanArray and pushing into it.
Any help much appreciated!
$items = $pocket->retrieve($params, $accessToken);
$numberArticles = count($items["list"]);
$hasRead = 0;
$hasNotRead = 0;
$readDatesArray = array();
$lifeSpanArray = array();
foreach ($items['list'] as $key) {
if ($key["status"] == 1) {
$hasRead++;
$timeAdded = date('m/d/Y', $key["time_added"]);
$dateRead = date('m/d/Y', $key["time_read"]);
// Where the problem is - only one item added
$lifeSpanArray['timeAdded'] = $timeAdded;
$lifeSpanArray['timeRead'] = $dateRead;
//Push into the read dates array
array_push($readDatesArray, $dateRead);
}
else {
$hasNotRead++;
}
}
var_dump($lifeSpanArray);
As you are overwriting your $lifeSpanArray array on each iteration you're must be getting only last entry so what you need is a two-dimension array,
Change this,
//Push into lifespan array
$lifeSpanArray['timeAdded'] = $timeAdded;
$lifeSpanArray['timeRead'] = $dateRead;
to,
$lifeSpanArray[] = array('timeAdded' => $timeAdded,'timeRead' => $dateRead);
$lifeSpanArray['timeAdded'] = $timeAdded;
$lifeSpanArray['timeRead'] = $dateRead;
For the above code, you are actually assigning a scalar value to $lifeSpanArray['timeAdded'] and $lifeSpanArray['timeRead'].
To treat them as array and push values to them, you should first initialize timeAdded and timeRead as arrays first:
$lifeSpanArray = array(
'timeAdded' => array(),
'timeRead' => array()
);
And pushing values to them within the foreach loop:
$lifeSpanArray['timeAdded'][] = $timeAdded;
$lifeSpanArray['timeRead'][] = $dateRead;
I am trying to run a function that gets information from a DB and returns an array of the values, so I can then extract it on the page.
Inside the function, after my query I have the following code:
$example_array = array();
while ($row = mysql_fetch_assoc($query) {
$example_array[] = $row;
}
return $example_array;
And there ends my function. Outside of it, I have this:
extract($example_array);
And I would assume I could then directly echo any of the variables that were previously in $example_array, e.g. <?= $example_var ?> but they do not contain any data.
Running print_r($example_array); gives an array that looks like this:
Array ( [0] => Array ( [example_var] => Example String ) )
The start of that code makes me think my array is somehow "lost" inside another array's first ([0]) value, and as such is not extracting correctly.
Have I gone about adding data to that initial $example_array incorrectly?
When you do $example_array[] = $row;, you assign the current row to a new index of $example_array. If you want to access it like $example_array['row_name'], you'd have to assign it like this:
$example_array = $row;
But when you do this, $example_array will be overwritten until it has reached the last row (which means that $example_array will always contain the last row from the query). If you just want the first row, you can do this and skip the whole while loop:
$example_array = mysql_fetch_assoc($query);
Maybe :
$example_array = array();
while ($row = mysql_fetch_assoc($query) {
array_push($example_array, $row['exemple_var']);
}
return $example_array;
The issue is that mysql_fetch_array would have meant $row['row_name'] was valid.
As you added $row to the array $example_array, you now need to access it via it's array id too, such as;
$example_array[0]['row_name'], $example_array[1]['row_name'] etc.
What exactly are you trying to achieve? May be easier to offer assistance if we know.
I have fields in mySQL which is currently being stored like this under the field "tags"
Shopping|Health & Beauty
Coffee|Shopping
What I'm trying to do is to loop through this to create a single dimension array and to grab only the unique values.
I have my query selecting DISTINCT tags from TABLE and run the loop like this:
while ($row_tags = mysql_fetch_assoc($r_tags)) {
$tags = $row_tags['tags'];
$imploded_tags[] = explode("|",$tags);
}
echo "<pre>";
print_r($imploded_tags);
The result from the print_r is showing it as a multidimensional array. I've tried to reexplode it and implode it in different ways, but I haven't been able to get any success. Is there a way that I can create this into a single dimension array? Not all tags will have an equal amount of tags separated by |, so I can't seem to get it to go with a function that I tried from another StackOverflow post. Any help would be greatly appreciated!
OUTPUT:
Array
(
[0] => Array
(
[0] => Shopping
[1] => Health & Beauty
)
[1] => Array
(
[0] => Coffee
[1] => Shopping
)
try this
while ($row_tags = mysql_fetch_assoc($r_tags)) {
$tags = $row_tags['tags'];
$tags = explode("|",$tags);
foreach($tags as $v){
$imploded_tags[] = $v;
}
}
I would do something like:
$imploded_tags = array_merge(explode("|",$tags), $imploded_tags);
}
$imploded_tags = array_unique($imploded_tags);
echo "<pre>";
print_r($imploded_tags);
See the manual on array_merge and array_unique.
However, I do think you are not using the right way to store your tags; they should be stored in a separate table as separate values.
What's going on is when you're fetching your rows from MySQL, you're essentially getting a bunch of data in an array in the first place, which is why you have to loop through them.
With your your implode function, you're taking a bunch of strings, then getting another array set and then appending that to an external array.
If you really wanted to get a single dimensional array without having this multidimensional thing going on, all you really need to do is utilize another loop within that loop.
$all_tags = array();
while ($row_tags = mysql_fetch_assoc($r_tags)) {
$tags = $row_tags['tags'];
$imploded_tags[] = explode("|",$tags);
for($i = 0; $i < count($imploded_tags); $i++) {
$all_tags[] = $imploded_tags[$i]
}
}
print_r($all_tags);
foreach ($topicarray as $key=>$value){
$files = mysql_query("mysqlquery");
while($file = mysql_fetch_array($files)){ extract($file);
$topicarray[$value] = array( array($id=>$title)
);
}
}
The first foreach loop is providing me with an array of unique values which forms a 1-dimensional array.
The while loop is intended to store another array of values inside the 1-dimensional array.
When the while loop returns to the beginning, it is overwriting it. So I only ever get the last returned set of values in the array.
My array ends up being a two dimensional array with only one value in each of the inner arrays.
Feels like I'm missing something very basic here - like a function or syntax which prevents the array from overwriting itself but instead, adds to the array.
Any ideas?
Step 1. Replace $topicarray[$value] with $topicarray[$value][]
Step 2. ???
Step 3. Profit
Make $topicarray[$value] an array of rows, instead of one row. Also, don't use extract here.
foreach ($topicarray as $key => $value) {
$rows = array();
$files = mysql_query("mysqlquery");
while($file = mysql_fetch_array($files)) {
$rows[] = array($file['id'] => $file['title']);
}
$topicarray[$value] = $rows;
}
Also, you should switch to PDO or MySQLi.
Assume that i have the following arrays containing:
Array (
[0] => 099/3274-6974
[1] => 099/12-365898
[2] => 001/323-9139
[3] => 002/3274-6974
[4] => 000/3623-8888
[5] => 001/323-9139
[6] => www.somesite.com
)
Where:
Values that starts with 000/, 002/ and 001/ represents mobile (cell) phone numbers
Values that starts with 099/ represents telephone (fixed) numbers
Vales that starts with www. represents web sites
I need to convert given array into 3 new arrays, each containing proper information, like arrayTelephone, arrayMobile, arraySite.
Function in_array works only if i know whole value of key in the given array, which is not my case.
Create the three empty arrays, loop through the source array with foreach, inspect each value (regexp is nice for this) and add the items to their respective arrays.
Loop through all the items and sort them into the appropriate arrays based on the first 4 characters.
$arrayTelephone = array();
$arrayMobile = array();
$arraySite = array();
foreach($data as $item) {
switch(substr($item, 0, 4)) {
case '000/':
case '001/':
case '002/':
$arrayMobile[] = $item;
break;
case '099/':
$arrayTelephone[] = $item;
break;
case 'www.':
$arraySite[] = $item;
break;
}
}
You can loop over the array and push the value to the correct new array based on your criteria. Example:
<?php
$fixed_array = array();
foreach ($data_array as $data) {
if (strpos($data, '099') === 0) {
$fixed_array[] = $data;
}
if ....
}
Yes i actually wrote the full code with preg_match but after reading some comments i accept that its better to show the way.
You will create three different arrays named arrayTelephone, arrayMobile, arraySite.
than you will search though your first array with foreach or for loop. Compare your current loop value with your criteria and push the value to one of the convenient new arrays (arrayTelephone, arrayMobile, arraySite) after pushing just continue your loop with "continue" statement.
You can find the solution by looking add the Perfect PHP Guide