For example:
$arr = array(3,5,2,5,3,9);
I want to show only common elements i.e 3,5 as output.
Here's my attempt:
<?php
$arr = array(3,5,2,5,3,9);
$temp_array = array();
foreach($arr as $val)
{
if(isset($temp_array[$val]))
{
$temp_array[$val] = $val;
}else{
$temp_array[$val] = 0;
}
}
foreach($temp_array as $val2)
{
if($val2 > 0)
{
echo $val2 . ', ';
}
}
?>
--
Output --
3, 5,
Try the following:
$arr = array(3,5,2,5,3,9);
foreach($arr as $key => $val){
//remove the item from the array in order
//to prevent printing duplicates twice
unset($arr[$key]);
//now if another copy of this key still exists in the array
//print it since it's a dup
if (in_array($val,$arr)){
echo $val . " ";
}
}
Output:
3 5
Addition:
I guess that the reason you were asked to implement it yourself (without using built-in functions) was to avoid answers like:
$unique = array_unique($arr);
$dupes = array_diff_key( $arr, $unique );
$arrnew = array();
for($i=0;$i<count($arr);$i++)
{
for($j=$i+1;$j<count($arr);$j++)
{
if($arr[$i]==$arr[$j])
{
$arrnew[]=$arr[$j];
}
}
}
Related
I have below small PHP script, I just need the value from the array if I provide key in $str.
$empid_array = array('CIP004 - Rinku Yadav', 'CIP005 - Shubham Sehgal');
$key = array();
$value = array();
$str = "CIP004";
foreach($empid_array as $code){
$str = preg_split("/\-/", $code);
array_push($key, $str[0]);
array_push($value, $str[1]);
}
$combined = array_combine($key, $value);
echo count($combined);
foreach($combined as $k => $v){
if($str == $k){
echo $v;
}
}
You could simplify your code considerably here. Step one, use array_walk to walk through the array and build the $combined array. Step two, there's no point in looping through the array, just access the value by the index:
$empid_array = ['CIP004 - Rinku Yadav', 'CIP005 - Shubham Sehgal'];
$str = "CIP004";
$combined = [];
// passing $combined by reference so we can modify it
array_walk($empid_array, function ($e) use (&$combined) {
list($id, $name) = explode(" - ", $e);
$combined[$id] = $name;
});
echo $combined[$str] ?? "Not found";
I need compare 2 arrays , the first array have one order and can´t change , in the other array i have different values , the first array must compare his id with the id of the other array , and if the id it´s the same , take the value and replace for show all in the same order
For Example :
$array_1=array("1a-dogs","2a-cats","3a-birds","4a-people");
$array_2=array("4a-walking","2a-cats");
The Result in this case i want get it´s this :
"1a-dogs","2a-cats","3a-birds","4a-walking"
If the id in this case 4a it´s the same , that entry must be modificate and put the value of other array and stay all in the same order
I do this but no get work me :
for($fte=0;$fte<count($array_1);$fte++)
{
$exp_id_tmp=explode("-",$array_1[$fte]);
$cr_temp[]="".$exp_id_tmp[0]."";
}
for($ftt=0;$ftt<count($array_2);$ftt++)
{
$exp_id_targ=explode("-",$array_2[$ftt]);
$cr_target[]="".$exp_id_targ[0]."";
}
/// Here I tried use array_diff and others but no can get the results as i want
How i can do this for get this results ?
Maybe you could use the array_udiff_assoc() function with a callback
Here you go. It's not the cleanest code I've ever written.
Runnable example: http://3v4l.org/kUC3r
<?php
$array_1=array("1a-dogs","2a-cats","3a-birds","4a-people");
$array_2=array("4a-walking","2a-cats");
function getKeyStartingWith($array, $startVal){
foreach($array as $key => $val){
if(strpos($val, $startVal) === 0){
return $key;
}
}
return false;
}
function getMergedArray($array_1, $array_2){
$array_3 = array();
foreach($array_1 as $key => $val){
$startVal = substr($val, 0, 2);
$array_2_key = getKeyStartingWith($array_2, $startVal);
if($array_2_key !== false){
$array_3[$key] = $array_2[$array_2_key];
} else {
$array_3[$key] = $val;
}
}
return $array_3;
}
$array_1 = getMergedArray($array_1, $array_2);
print_r($array_1);
First split the 2 arrays into proper key and value pairs (key = 1a and value = dogs). Then try looping through the first array and for each of its keys check to see if it exists in the second array. If it does, replace the value from the second array in the first. And at the end your first array will contain the result you want.
Like so:
$array_1 = array("1a-dogs","2a-cats","3a-birds","4a-people");
$array_2 = array("4a-walking","2a-cats");
function splitArray ($arrayInput)
{
$arrayOutput = array();
foreach ($arrayInput as $element) {
$tempArray = explode('-', $element);
$arrayOutput[$tempArray[0]] = $tempArray[1];
}
return $arrayOutput;
}
$arraySplit1 = splitArray($array_1);
$arraySplit2 = splitArray($array_2);
foreach ($arraySplit1 as $key1 => $value1) {
if (array_key_exists($key1, $arraySplit2)) {
$arraySplit1[$key1] = $arraySplit2[$key1];
}
}
print_r($arraySplit1);
See it working here:
http://3v4l.org/2BrVI
$array_1=array("1a-dogs","2a-cats","3a-birds","4a-people");
$array_2=array("4a-walking","2a-cats");
function merge_array($arr1, $arr2) {
$arr_tmp1 = array();
foreach($arr1 as $val) {
list($key, $val) = explode('-', $val);
$arr_tmp1[$key] = $val;
}
foreach($arr2 as $val) {
list($key, $val) = explode('-', $val);
if(array_key_exists($key, $arr_tmp1))
$arr_tmp1[$key] = $val;
}
return $arr_tmp1;
}
$result = merge_array($array_1, $array_2);
echo '<pre>';
print_r($result);
echo '</pre>';
This short code works properly, you'll get this result:
Array
(
[1a] => dogs
[2a] => cats
[3a] => birds
[4a] => walking
)
I need to get one time occurence on my array, with my code I get only first result here is my example code:
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
for ($i=0; $i<count($arr); $i++)
{
if($arrs[$arr[$i]]==1)
{
//do something...in this example i expect to receive b c and d
}
}
Thanks in advance
ciao h
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
for ($i=0; $i<count($arr); $i++)
{
if($arrs[$arr[$i]]==1)
{
echo $arr[$i];
}
}
That should display bcd
$arr=array("a","a","b","c","d");
$result = array();
$doubles = array();
while( !empty( $arr ) ) {
$value = array_pop( $arr );
if( !in_array( $value, $arr )
&& !in_array( $value, $doubles ) ) {
$result[] = $value;
}
else {
$doubles[] = $value;
}
}
May be you've miss your real results:
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
/*
now $arrs is:
array (
'a' => 2,
'b' => 1,
'c' => 1,
'd' => 1,
)
*/
foreach($arrs as $id => $count){
if($count==1) {
// do your code
}
}
/*******************************************************/
/* usefull version */
/*******************************************************/
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
foreach($arr as $id ){
if($arrs[$id]==1){
// do your code
echo "$id is single\n";
}
}
You just need to retrieve any value which only occurs once in the array, right? Try this:
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
foreach ($arrs as $uniqueValue => $count)
{
if($value == 1) {
echo $uniqueValue;
}
}
array_count_values returns an associative array where the key is the value found and its value is the number of times it occurs in the original array. This loop simply iterates over each unique value found in your array (i.e. the keys from array_count_values) and checks if it was only found once (i.e. that key has a value of 1). If it does, it echos out the value. Of course, you probably want to do something a bit more complex with the value, but this works as a placeholder.
$count = 0;
foreach(array("a","a","b","c","d") as $v){
if($v == 1){$count++;}
}
I have a multidimensional array:
$array=array( 0=>array('text'=>'text1','desc'=>'blablabla'),
1=>array('text'=>'text2','desc'=>'blablabla'),
2=>array('text'=>'blablabla','desc'=>'blablabla'));
Is there a function to return a monodimensional array based on the $text values?
Example:
monoarray($array);
//returns: array(0=>'text1',1=>'text2',2=>'blablabla');
Maybe a built-in function?
This will return array with first values in inner arrays:
$ar = array_map('array_shift', $array);
For last values this will do:
$ar = array_map('array_pop', $array);
If you want to take another element from inner array's, you must wrote your own function (PHP 5.3 attitude):
$ar = array_map(function($a) {
return $a[(key you want to return)];
}, $array);
Do it like this:
function GetItOut($multiarray, $FindKey)
{
$result = array();
foreach($multiarray as $MultiKey => $array)
$result[$MultiKey] = $array[$FindKey];
return $result;
}
$Result = GetItOut($multiarray, 'text');
print_r($Result);
Easiest way is to define your own function, with a foreach loop. You could probably use one of the numerous php array functions, but it's probably not worth your time.
The foreach loop would look something like:
function monoarray($myArray) {
$output = array();
foreach($myArray as $key=>$value) {
if( $key == 'text' ) {
$output[] = $value;
}
}
return $output;
}
If the order of your keys never changes (i.e.: text is always the first one), you can use:
$new_array = array_map('current', $array);
Otherwise, you can use:
$new_array = array_map(function($val) {
return $val['text'];
}, $array);
Or:
$new_array = array();
foreach ($array as $val) {
$new_array[] = $val['text'];
}
Try this:
function monoarray($array)
{
$result = array();
if (is_array($array) === true)
{
foreach (new RecursiveIteratorIterator(new RecursiveArrayIterator($array)) as $value)
{
$result[] = $value;
}
}
return $result;
}
With PHP, you only have to use the function print_r();
So --> print_r($array);
Hope that will help you :D
Let's say I have this:
$array = array("john" => "doe", "foe" => "bar", "oh" => "yeah");
foreach($array as $i=>$k)
{
echo $i.'-'.$k.',';
}
echoes "john-doe,foe-bar,oh-yeah,"
How do I get rid of the last comma?
Alternatively you can use the rtrim function as:
$result = '';
foreach($array as $i=>$k) {
$result .= $i.'-'.$k.',';
}
$result = rtrim($result,',');
echo $result;
I dislike all previous recipes.
Php is not C and has higher-level ways to deal with this particular problem.
I will begin from the point where you have an array like this:
$array = array('john-doe', 'foe-bar', 'oh-yeah');
You can build such an array from the initial one using a loop or array_map() function. Note that I'm using single-quoted strings. This is a micro-optimization if you don't have variable names that need to be substituted.
Now you need to generate a CSV string from this array, it can be done like this:
echo implode(',', $array);
One method is by using substr
$array = array("john" => "doe", "foe" => "bar", "oh" => "yeah");
$output = "";
foreach($array as $i=>$k)
{
$output .= $i.'-'.$k.',';
}
$output = substr($output, 0, -1);
echo $output;
Another method would be using implode
$array = array("john" => "doe", "foe" => "bar", "oh" => "yeah");
$output = array();
foreach($array as $i=>$k)
{
$output[] = $i.'-'.$k;
}
echo implode(',', $output);
I don't like this idea of using substr at all, since it's the style of bad programming. The idea is to concatenate all elements and to separate them by special "separating" phrases. The idea to call the substring for that is like to use a laser to shoot the birds.
In the project I am currently dealing with, we try to get rid of bad habits in coding. And this sample is considered one of them. We force programmers to write this code like this:
$first = true;
$result = "";
foreach ($array as $i => $k) {
if (!$first) $result .= ",";
$first = false;
$result .= $i.'-'.$k;
}
echo $result;
The purpose of this code is much clearer, than the one that uses substr. Or you can simply use implode function (our project is in Java, so we had to design our own function for concatenating strings that way). You should use substr function only when you have a real need for that. Here this should be avoided, since it's a sign of bad programming style.
I always use this method:
$result = '';
foreach($array as $i=>$k) {
if(strlen($result) > 0) {
$result .= ","
}
$result .= $i.'-'.$k;
}
echo $result;
try this code after foreach condition then echo $result1
$result1=substr($i, 0, -1);
Assuming the array is an index, this is working for me. I loop $i and test $i against the $key. When the key ends, the commas do not print. Notice the IF has two values to make sure the first value does not have a comma at the very beginning.
foreach($array as $key => $value)
{
$w = $key;
//echo "<br>w: ".$w."<br>";// test text
//echo "x: ".$x."<br>";// test text
if($w == $x && $w != 0 )
{
echo ", ";
}
echo $value;
$x++;
}
this would do:
rtrim ($string, ',')
see this example you can easily understand
$name = ["sumon","karim","akash"];
foreach($name as $key =>$value){
echo $value;
if($key<count($name){
echo ",";
}
}
I have removed comma from last value of aray by using last key of array. Hope this will give you idea.
$last_key = end(array_keys($myArray));
foreach ($myArray as $key => $value ) {
$product_cateogry_details="SELECT * FROM `product_cateogry` WHERE `admin_id`='$admin_id' AND `id` = '$value'";
$product_cateogry_details_query=mysqli_query($con,$product_cateogry_details);
$detail=mysqli_fetch_array($product_cateogry_details_query);
if ($last_key == $key) {
echo $detail['product_cateogry'];
}else{
echo $detail['product_cateogry']." , ";
}
}
$foods = [
'vegetables' => 'brinjal',
'fruits' => 'orange',
'drinks' => 'water'
];
$separateKeys = array_keys($foods);
$countedKeys = count($separateKeys);
for ($i = 0; $i < $countedKeys; $i++) {
if ($i == $countedKeys - 1) {
echo $foods[$separateKeys[$i]] . "";
} else {
echo $foods[$separateKeys[$i]] . ", \n";
}
}
Here $foods is my sample associative array.
I separated the keys of the array to count the keys.
Then by a for loop, I have printed the comma if it is not the last element and removed the comma if it is the last element by $countedKeys-1.