I want to check data in array to see if there are null values. If there are, I'd like to display an alert.
Example:
$data = array(1 => 'AKB48', 2 => '', 3 => 'JKT48');
The Array of index 1 ($data[1]) is null, and I want it to display "WARNING, data in array is null"
if data in array does not have empty/null values then don't show an alert:
$data = array(1 => 'AKB48', 2 => 'HKT48', 3 => 'JKT48');
(the above array will no trigger an alert)
How can I achieve this solution?
something like this?
$data = array(1 => 'AKB48', 2 => '', 3 => 'JKT48');
foreach($data as $val) {
if($val == '') {
echo "alert, array consist of empty value";
}
}
$data = array(1 => 'AKB48', 2 => '', 3 => 'JKT48');
foreach($data as $v)
{
if(empty($v))
{
echo "Array contains null value";
break;
}
}
Something like this?
isDefined will check if the value is a valid non-empty String.
function isDefined($var) {
return isset($var) && !is_null($var) && !empty($var);
}
$data = array(
array('AKB48', 'HKT48', NULL),
array('AKB49', '', 'JKT49'),
array('AKB50', 'HKT50', 'JKT50')
);
for ($i = 0; $i < count($data); $i++) {
foreach ($data[$i] as $col) {
if (!isDefined($col)) {
echo "<<<Attention: Array #$i contains an empty value!>>> ";
}
}
}
Running example of code above.
Related
I have a multidimensional array which has keys and key has values or have another array with keys and values so I want to search by keys but in input like 230 is user input
and it will go to 3 then 4 then 1 if result is a value but not an array it must print the value like
input = 230 result should be = "3-4-1"
so I need to str_split the number and search it 1 by 1 if first number is array then look for second kinda
edit1 = I found the way to split the key
//edit1
$keys = "021";
$keysSplit =str_split($keys, strlen($keys)/strlen($keys));
echo $keys[0];
//edit 1 ends
$arr = [0 => [0=>"1-1", 1 => "1-2" , 2=>"1-3", 3=>[0=>"1-4-1", 1 => "1-4-2" , 2=>"1-4-3"]],
1 => [0=>"2-1", 1 => "2-2" , 2=>"2-3"],
2 => [0=>"3-1", 1 => "3-2" , 2=>"3-3", 3=>[0 =>"3-4-1" , 1=> "3-4-2"]],
];
$keys = "021";
function searchByKey($array , $keys){
$result = [];
$keys = "021";
$keys =str_split($keys, strlen($keys)/strlen($keys));
$key1 = $keys[0];
$key2 = $keys [1];
$key3 = $keys [2];
foreach ($array as $key1 => $value){
if (is_array($value)){
$key1 = null;
$key1 = $key2;
$key2 = $key3;
return searchByKey($value , $key1);
}
else {
$result=$value;
echo $result;
}
}
}
$arr = searchByKey($arr, $keys);
The function only works as key and value given and it will print every key and value on the key it asked first so its not the thing I wanted to do could anyone help and explain?
Answer given by #Anggara I made it in to function ;
$input = "11";
function searchByNumber($array, $input){
$result = $array;
for ($i = 0; $i < strlen($input); $i++) {
if (is_array($result)) {
$result = $result[$input[$i]];
} else {
$result = "Does not exists";
break;
}
}
echo $result;
}
$arr = searchByNumber($arr, $input);
You can access char in string like accessing an array. For example:
$input = "230";
// $input[0] is "2"
// $input[1] is "3"
// $input[2] is "0"
So my approach is to loop for each character in input key, and look for corresponding value in $arr. Each iteration will set found array element into variable $result. If the searched key does not exist (ex: "021"), print error message.
<?php
$arr = [
0 => [
0 => "1-1",
1 => "1-2",
2 => "1-3",
3 => [
0 => "1-4-1",
1 => "1-4-2",
2 => "1-4-3"
]
],
1 => [
0 => "2-1",
1 => "2-2",
2 => "2-3"
],
2 => [
0 => "3-1",
1 => "3-2",
2 => "3-3",
3 => [
0 => "3-4-1",
1 => "3-4-2"
]
],
];
$input = "230";
$result = $arr;
for ($i = 0; $i < strlen($input); $i++) {
if (is_array($result)) {
$result = $result[$input[$i]];
} else {
$result = 'Can not traverse path';
break;
}
}
echo $result;
After splitting the keys
for($i=0;$i<strlen($keys);$i++){
$arr = $arr[$keys[$i]];
}
if(is_array($arr)){
echo json_encode($arr);
}else{
echo $arr;
}
You need a loop, which will go through the keys one by one and assigning into the array.
I have two sets of arrays coming from $_POST. Keys for both will be numeric and the count will be the same, since they come in pairs as names and numbers:
$_POST[names]
(
[0] => First
[1] => Second
[2] =>
[3] => Fourth
)
$_POST[numbers]
(
[0] => 10
[1] =>
[2] => 3
[3] => 3
)
Now I need to combine those two, but remove each entry where either values are missing.
The result should be something like:
$finalArray
(
[First] => 10
[Fourth] => 3
)
Post data is dynamically created so there might be different values missing based on user input.
I tried doing something like:
if (array_key_exists('names', $_POST)) {
$names = array_filter($_POST['names']);
$numbers = array_filter($_POST['numbers']);
if($names and $numbers) {
$final = array_combine($names, $numbers);
}
}
But I can't seem to filter it correctly, since its giving me an error:
Warning: array_combine(): Both parameters should have an equal number of elements
How about using array_filter with ARRAY_FILTER_USE_BOTH flag on?
<?php
$array1 = [
0 => "First",
1 => "Second",
2 => "",
3 => "Fourth",
];
$array2 = [
0 => 10,
1 => "",
2 => 3,
3 => 3,
];
var_dump(array_filter(array_combine($array1, $array2), function($value, $key) {
return $key == "" || $value == "" ? false : $value;
}, ARRAY_FILTER_USE_BOTH ));
/*
Output:
array(2) {
["First"]=>
int(10)
["Fourth"]=>
int(3)
}
*/
Here's a fun way:
$result = array_flip(array_flip(array_filter(array_combine($_POST['names'],
$_POST['numbers']))));
// create array using $_POST['names'] as keys and $_POST['numbers'] as values
$result = array_combine($_POST['names'], $_POST['numbers']);
// remove entries that have empty values
$result = array_filter($result);
// remove entry with empty key
unset($result[null]);
print_r($result);
If both arrays will have the same count, and the keys will always be numeric, you could do the following:
$total = count($_POST['names']);
$final = array();
for ($i = 0; $i < $total; $i++) {
if (trim($_POST['names'][$i]) != '' && trim($_POST['numbers'][$i]) != '') {
$final[$_POST['names'][$i]] = $_POST['numbers'][$i];
}
}
Or if you prefer to use a foreach instead of for
$final = array();
foreach ($_POST['names'] as $key => $value) {
if (trim($value) != '' && trim($_POST['numbers'][$key]) != '') {
$final[$value] = $_POST['numbers'][$key];
}
}
Takeing your previous information into account:
both keys will be numeric and the count will be the same, since they come in pairs as names and numbers
$myNewArray = array();
$count = 0;
foreach ($_POST['names'] as $bufferArray)
{
if (($bufferArray[$count]!=NULL)&&($_POST['numbers][$count]!=NULL))
{
array_push($myNewArray, array($bufferArray[$count] => $_POST['numbers][$count]);
}
$count++;
}
Let me know if that helps! :)
Note: I made some edits to the code.
Also, my previous code checks if the empty array spaces are NULL. If you want to check if they are either NULL or "" (empty), then replace the line of code with:
if (($bufferArray[$count]!=NULL)&&($_POST['numbers][$count]!=NULL)&&($bufferArray[$count]!="")&&($_POST['numbers][$count]!=""))
{...}
I have an array that includes empty values.
Is there any way to split array into chunks using empty value as a mask?
Thank you,
Without seeing your array structure I think a simple foreach could do the job:
$a = array(
1 => 'test',
2 => 'test',
3 => '',
4 => 'test',
5 => 'test',
6 => '',
7 => 'test'
);
$new_array = array();
$i = 0;
foreach ($a as $k => $v)
{
if ( ! empty($v))
{
$new_array[$i][] = $v;
continue;
}
$i++;
}
print_r($new_array);
Try this,
If $values is the array, then
$i = 0;
foreach($values as $value)
{
if($value != "")
{
$new[$i][] = $value;
}
else
{
$i++;
}
}
Hope, this wil help.
I have several strings, how can I search the first value and get other values from it?
print_r or ?:
Array( [0] => Title,11,11 [1] => Would,22,22 [2] => Post,55,55 [3] => Ask,66,66 )
like:
If send for this array value Title and getting values Title,11,11
Or send Would getting values Would,22,22
Or send Post getting values Post,55,55
Or send Ask getting values Ask,66,66
How can do it?
Loop over the array with foreach and match the value with strpos.
suppose:
$arr = Array( [0] => Title,11,11 [1] => Would,22,22 [2] => Post,55,55 [3] => Ask,66,66 )
$string = 'Would';
then
//Call the function with the search value in $string and the actual array
$required_arr[$string] = search_my_array($string, $arr);
function($str , $array)
{
//Trace the complete array
for($i = 0; $i<count($array); $i++)
{
//Break the array using explode function based on ','
$arr_values[$i] = explode(',',$array[i])
if($str == $arr_values[$i][0]) // Match the First String with the required string
{
//On match return the array with the values contained in it
return array($arr_values[$i][1], $arr_values[$i][2]);
}
}
}
Now
$required_arr['Would'] // will hold Array([0] => 22 [1] => 22)
Write a function to search the array. This should work well enough
<?php
// test array
$arr = array('Title,11,11','Would,22,22','Post,55,55','Ask,66,66');
// define search function that you pass an array and a search string to
function search($needle,$haystack){
// loop over each passed in array element
foreach($haystack as $v){
// if there is a match at the first position
if(strpos($v,$needle) === 0)
// return the current array element
return $v;
}
// otherwise retur false if not found
return false;
}
// test the function
echo search("Would",$arr);
?>
are the indices important ? why not ..
$arr = array(
'Title' => array(11, 11),
'Would' => array(22, 22),
'Post' => array(55, 55),
'Ask' => array(66,66)
);
$send = "Title"; // for example
$result = $arr[$send];
How about using something like, so you don't loop trough entire array:
$array = array( "Title,11,11", "Would,22,22", "Post,55,55", "Ask,66,66" );
$key = my_array_search('Would', $array);
$getvalues = explode(",", $array[$key]);
function my_array_search($needle = null, $haystack_array = null, $skip = 0)
{
if($needle == null || $haystack_array == null)
die('$needle and $haystack_array are mandatory for function my_array_search()');
foreach($haystack_array as $key => $eval)
{
if($skip != 0)$eval = substr($eval, $skip);
if(stristr($eval, $needle) !== false) return $key;
}
return false;
}
I have an array range $row['ADDwav'] - $row['ADDwav16']
How can I count the number of these that isset() and not NULL?
You can use array_filter with is_null (as callback) for that:
count(array_filter($row, "is_null"))
If you want the ones that are not null, then you'd have to subtract that from the original array length still count($row) - count(array_filter(...))
Try something like that
$counter = 0;
foreach($row as $r)
{
if($r !== null)
{
$counter++;
}
}
echo "Total not null items : " . $counter;
The above code will work. Also the values into foreach are all set, otherwhise will not loop through them ;)
In case your array is like that :
$row = array(
'ADDwav' => null,
'ADDwav1' => 'somevalue',
'ADDwav2' => 'anothervalue',
'ADDwav3' => '',
'ADDwav...' => '...',
'ADDwav16' => null
);
and you like to count the values that are not empty or null then you have to modify the code in the next form :
$counter = 0;
foreach($row as $k => $r)
{
if($r !== null || $r !== '')
{
$counter++;
}
}
echo "Total not null items : " . $counter;
use array_filter and is_null
foreach($row as $r)
if($r !== null)
...
..
.
This one will remove the array which is false or null...
$entry = array(
0 => 'foo',
1 => false,
2 => -1,
3 => null,
4 => ''
);
echo count(array_filter($entry));