i want my code to show certain images based on a given string like "Brand1,Brand2,Brand3"
I already declared the images with:
<?php
$brandString ="Brand1,Brand2,Brand3";
$images = [
'Brand1' => 'Brand1.png',
'Brand2' => 'Brand2.png',
'Brand3' => 'Brand3.png',
'Brand4' => 'Brand4.png'
];
Now I only want to show the images that are declared in the string. What is the best way to do this?
Using explode, you can split the string into an array on every occurance of a comma. That way you can just run through your brand array by using foreach.
So, using your example it would look something like this:
<?php
$brandString ="Brand1,Brand2,Brand3";
$brandArray = explode(",", $brandString);
$images = [
'Brand1' => 'Brand1.png',
'Brand2' => 'Brand2.png',
'Brand3' => 'Brand3.png',
'Brand4' => 'Brand4.png'
];
foreach($brandArray AS $brand) {
echo $images[$brand]; //this would print out the image names in order: Brand1.jpg, Brand2.jpg, Brand3.jpg
}
Related
I'm trying to construct an array where there only strings and the array would look like this
key->key->value
To explain it I attached two screenshots below.
I start with this:
After my code below I'm 90% there, yet there is an array in value on the third level instead of simple value.
Here is some code:
$theme = ThemeHandler::with('sections.settings')->find($activeTheme);
$themeSettings = $theme->sections;
$themeSettings = collect($themeSettings->toArray());
// dd($themeSettings);
$themeSections = [];
foreach ($themeSettings as $key => $value) {
$settings = collect($value['settings']);
$settings = $settings->mapToGroups(function ($item) {
return [$item['key'] => $item['value']];
});
$themeSections[$value['key']] = $settings->toArray();
}
dd($themeSections);
I would like to end up with this structure
key->key->value
and not
key->key->single_element_array->value
I'm not sure how I end up with an array at the bottom level when I do this
return [$item['key'] => $item['value']];
inside the mapToGroups, which is a function found here: https://laravel.com/docs/5.8/collections#method-maptogroups
Maybe I misunderstand how mapToGroups work. Anybody has an idea how to get key->key->value structure output?
Use mapWithKeys() instead of mapToGroups().
You're getting an array instead of the simple value you expect because the value is a group, albeit a group with only one member.
mapToGroups() groups all the values with the same key, but mapWithKeys() will assign a single value to each key.
You can see in the examples in the collection documentation, mapToGroups() produces a result like this:
[
'Sales' => ['John Doe', 'Jane Doe'],
'Marketing' => ['Johnny Doe'],
]
And mapWithKeys() result is like this:
[
'john#example.com' => 'John',
'jane#example.com' => 'Jane',
]
I realize there are a number of questions about multidimensional arrays and foreach loops, and I have spent hours reading through them and trying to get my own loop to work -- without success. If the solution is a duplicate, I'll remove my question (or link to another if that is preferred).
Now, the challenge:
Using an array of returned MYSQL results. The results are from multiple joined tables in an associative array. Now I need to convert it to the multidimensional array I need.
I've got most of it working, but my issue is looping through and adding new items to the right place in the array.
Here's some code:
//example of how array is setup in the way I want, this part works.
foreach($results as $i => $a):
//some other code is here, see below.
$items[$i] = [
"id" => $a['id'],
"itemid" => $a['itemid'],
"name" => $a['name'],
"def" => $a['def'],
"class" => $a['class'],
"timeline" => $a['timeline'],
"files" => [
[0] => [
"id" => $a['fileid'],
"name" => $a['filename'],
"path" => $a['filepath'],
"type" => $a['filetype']
]
],
"tags" => [
[0] => [
"id" => $a['tagid'],
"name" => $a['tagname']
]
]
];
endforeach;
Then I've tried a number of ways to loop through in order to only add to the 'tags' or 'files' if the item 'id' is the same as the last. Here is the current code in my editor, not working:
//inside foreach loop, before above code
if($items[$i-1]['id'] == $a['id']):
//it is the same item, works to here.
if(in_array($a['filename'], $items[$i-1], FALSE)):
//add to files array for last item
$items[$i-1]['files'][] = [
"id" => $a['fileid'],
"name" => $a['filename'],
"path" => $a['filepath'],
"type" => $a['filetype']
];
elseif(in_array($a['tagname'], $items[$i-1], FALSE)):
//add to tags array for last item
$items[$i-1]['tags'][] = [
"id" => $a['tagid'],
"name" => $a['tagname']
];
endif;
else:// else it does the code above
As you can see, my most recent attempt was to use in_array, which I now realize doesn't work on multidimensional arrays. My issue is that I can't figure out how to determine if its a new file or new tag for the same item.
Ultimately, I want an array of 'items' which have multiple 'files' and 'tags.' I'm going to json_encode and use it with JS afterwards.
Any advice on how to get this working or optimize it, would be greatly appreciated.
P.S. As I mentioned above, I know this question has been asked before -- though I wasn't able to get their solutions working for me. I'll remove this question if the solution is a duplicate (as in, it's not really helpful to others). Thank you for any help, it is greatly appreciated!
Don't use "autoincrementing" array indices as they easily get messed up. Use your database id since it's already there:
//example of how array is setup in the way I want, this part works.
foreach($results as $i => $a):
$items[$a['id']] = [ // THIS CHANGED.
"id" => $a['id'],
"itemid" => $a['itemid'],
...
Now, with any further result, you can easily check, if the id is already in your array:
if (isset($items[$a['id']])) {
// We had this id before, just add files/tags to it.
// Check first, if files subarray exists, if not: create it.
if (!isset($items[$a['id']]['files'])) {
$items[$a['id']]['files'] = array();
}
$items[$a['id']]['files'][] = array(...); // add the new file.
// Repeat for tags.
}
If your result could return the same file more than once for an id, you can check if the filename is already in there by using a search function:
$filename = $a['filename'];
if (!searchFilename($filename, $items[$a['id']]['files']) {
// Filename is not in there, yet.
// Add file info.
}
function searchFilename($id, $array) {
foreach ($array as $key => $val) {
if ($val['filename'] === $id) {
return true;
}
}
return false;
}
Same applies to tags in a similar way.
In the end, if you do not want the ids for index of $items, just call:
$items = array_values($items);
I will need to output an array something along the lines of
[
0 => ['text' => 'category'],
1 => ['text' => category']
]
So basicly an array for each category in my database. I need to output them like this because of how they will be exported to another site. (I cannot foreach inside the export)
My current code, is a foreach loop that runs through my categories. If i var_dump my field variable inside the foreach loop i get the result i want, but as mentioned i need to export everything in the format like above out of the foreach loop.
Code:
foreach ($categories as $category) {
$fieldvalue = ['text' => $category->categoryname];
}
What i have tried:
Putting the array in a string to explode outside the loop-
Result: Because of the "same identifier" issue i could only export the last result
What i need to be done:
My current code outputs the array as a text string so basicly
$fieldvalue ? "['text' => '$category->categoryname']";
And my output will be
array:4 [
0 => "['text' => value1]"
1 => "['text' => value2]"
2 => "['text' => value3]"
3 => "['text' => value4]"
]
I just need to get the string to be an array.
Try:
foreach ($categories as $category) {
$fieldvalue[] = ['text' => $category->categoryname];
}
You want the result to be an array that contains many arrays (multi-dimensional array). Using $var[] = $something adds that $something as an array object.
$header_content = array();
$header_content['pageone'][] = array(
'image' => 'photo-one.png',
'desc' => "One. Some text here.",
);
$header_content['pagetwo'][] = array(
'image' => 'photo-two.png',
'desc' => "Two. Some text here.",
);
I do not want to echo the entire array, just certain parts when called... like $header_content['pageone']['image'], except this doesn't work... How do you go about echoing parts of an array?
I have searched but it's all a little confusing right now for me. Thanks.
Define it like -
$header_content['pagetwo'] = array(
'image' => 'photo-two.png',
'desc' => "Two. Some text here.",
);
The keys are different pageone, pagetwo. No need of that extra index i think. And then access it - echo $header_dontent['pagetwo']['image'];
For printing array values, you can use :
print_r function
Example : print_r($array)
Specific key data can be accessed through : print_r($array[$key])
OR
var_dump function
Example : var_dump($array)
Specific key data can be accessed through : var_dump($array[$key])
use it like $header_content['pageone'][0]['image']
Since
$header_content['pageone'][] = array();
[] appends an element at the end of an array.
$string = "php, photoshop, css";
I'm producing an array from the comma separated values above using the str_getcsv() function:
$array = str_getcsv($string);
Result:
Array ( [0] => php [1] => photoshop [2] => css )
How can I replace the key integers with a string tag for all elements like seen below?
Array ( [tag] => php [tag] => photoshop [tag] => css )
Edit: if not possible what alternative can I apply? I need the array keys to be identical for a dynamic query with multiple OR clauses
e.g.
SELECT * FROM ('posts') WHERE 'tag' LIKE '%php% OR 'tag' LIKE '%photoshop% OR 'tag' LIKE '%css%'
I'm producing the query via a function that uses the array key as a column name and value as criteria.
That is not possible. You can have only one item per key. But in your example, the string "tag" would be the key of every item.
The other way arround would work. So having an array like this:
array('php' => 'tag', 'photoshop' => 'tag', 'css' => 'tag');
This might help you, if you want to save the "type" of each entry in an array. But as all the entries of your array seems to be from the same type, just forget about the "tag" and only store the values in a numeric array.
Or you can use a multidimensional array within the numeric array to save the type:
array(
0 => array( 'type' => 'tag', 'value' => 'php' ),
1 => array( 'type' => 'tag', 'value' => 'photoshop' ),
2 => array( 'type' => 'tag', 'value' => 'css' )
);
But still using just an numeric array should be fine if all the entries have the same type. I can even think of a last one:
array(
'tag' => array('php', 'photoshop', 'css')
);
But even if I repeat myself: Just use an ordinary array and name it something like $tag!
BTW: explode(', ', %string) is the more common function to split a string.
To build SQL statement you might do something like this:
// ... inside you build function
if(is_array($value)){
$sql .= "'".$key."' LIKE '%."implode("%' OR '".$key."' LIKE '%", $value)."%'";
} else {
$sql .= "'".$key."' LIKE '%".$value."%'";
}
This might look confusing but it's much cleaner than runnig into two foreach-loops building the query.
That won't work. Your array keys have to be unique, or subsequent additions will simply overwrite the previous key.
As the others said, keys have to be unique. Otherwise, which element should be returned if you access $arr['tag']? If you now say "all of them", then create a nested array:
$array = array();
$array['tag'] = str_getcsv($string);
The value $array['tag'] will be another array (the one you already have) with numerical keys. This makes, because you have a list of tags and lists can be represented as arrays too.
Understanding arrays is very important if you want to work with PHP, so I suggest to read the array manual.
Assuming you know the size of your array beforehand
$tags = array("tag1","tag2","tag3");
$data = array("php","photoshop","css");
$myarray = array();
for ($i=0; $i<count($data); $i++) {
$myarray[$i] = array($data[$i], $tags[$i]);
}
Then
echo $myarray[0][0] . ", " . $myarray[0][1];
Outputs:
php, tag1