i have an array
$array=(1,1,2,3,3,3,4);
i need to find each element how many times each element is exist in array .
So that i use
$occurences = array_count_values($array);
output is
Array
(
[1] => 2
[2] => 1
[3] => 3
[4] => 1
)
But i need to arrage the out put in following format
1 : 2
2 : 1
3 : 3
4 : 1
how can i do that ?
is there an other solution rater than using array_count_values
please help ;
Use foreach to iterate over every occurance and echo them out.
// If they are in wrong order, sort your array
ksort($occurences);
// Print output
if(count($occurences)>0){
foreach ($occurences as $key => $value) {
echo $key.' : '.$value.'<br />';
}
}
EDIT
To sort by no of occurances, use arsort.
arsort($occurences);
Of course, before printing it.
If 2:1 must come before 4:1 in your case, use:
asort($occurences);
arsort($occurences);
Just use this loop to have output like you need
foreach ($occurences as $k => $v) {
echo "$k : $v <br>";
}
You can use json_encode or array_keys and array_values
<?php
$array= array(1,1,2,3,3,3,4);
$occurences = array_count_values($array);
$array_keys = array_keys($occurences);
$array_values = array_values($occurences);
for($i=0; $i<count($array_keys); $i++) {
echo $array_keys[$i].':'.$array_values[$i].'\n';//add \n or \br tag
}
//you can echo json_encode
echo json_encode($occurences);
Related
I've started learning about arrays and they've very confusing. I want to generate 4 numbers using this:
$numbers = range(1,4);
Then I shuffle with this:
shuffle($numbers);
Now I want to get each number as a variable, I've been told the best way is arrays. I have this code:
foreach($numbers as $number){
$test = array("first"=>"$number");
echo $test['first'];
}
What this does is echo all 4 numbers together, like "3142" or "3241" etc. Which is close to what I want, but I need all 4 numbers to have their own variable each. So I made this:
foreach($numbers as $number){
$test = array("first"=>"$number","second"=>"$number","third"=>"$number","fourth"=>"$number");
echo $test['first']," ",$test['second']," ",$test['third']," ",$test['fourth']," <br>";
}
This just echoes the 4 numbers 4 times. I need "first" to be the first number, "second" to be the second number of the 4 and the same for the third and fourth. I've been searching the web but don't know specifically what to search for to find the answer.
If someone answers could they please put as much detail into what certain functions do as possible, I want to learn not just get working code :)
You can use sizeof() it is return size of array size, and pass the key value manually. Like-
echo $numbers[0];
echo $numbers[1];
echo $numbers[2];
Here is a full code, try it
$numbers = range(1,4); //generate four numbers
shuffle($numbers); //shuffle them
$test = array(); //create array for the results
$words = array("1st", "2nd", "3rd", "4th","5th"); //create your array keys
$i=0;
foreach($numbers as $number){
$test[] = array($words[$i]=>$number); //add your array keys & values
$i++;
}
print_r($test); //show your results
If my understanding is correct you have an array and you want certain values from within it?
Then why not just use the array keys:
$array = array('peach','pear','apple','orange','banana');
echo $array[0]; // peach
echo $array[1]; // pear
echo $array[2]; // apple
Or you could loop through the array like so:
foreach ($array as $arrayKey => $arrayValue) {
// First value in the array is now below
echo $arrayKey; // 0
echo $arrayValue; // peach
}
You can also check if a value is in an array like so:
if (in_array('orange', $array)) {
echo 'yes';
}
Edit:
// Our array values
$array = array('peach','pear','apple','orange','banana');
// We won't shuffle for the example, we need expected results
#$array = shuffle($array);
// We want the first 3 values of the array
$keysRequired = array(0,1,2);
// This will hold our results
$storageArray = array();
// So for the first iteration of the loop $arrayKey is going to be 0
foreach ($array as $arrayKey => $arrayValue) {
// If the array key matches one of the values in the required array
if (in_array($arrayKey, $keysRequired)) {
// Store it within the storage array so we know what value it is
$storageArray[] = $arrayValue;
}
}
// Let's see what values have been stored
echo "<pre>";
print_r($storageArray);
echo "</pre>";
Would give you the following:
Array
(
[0] => 'peach'
[1] => 'pear'
[2] => 'apple'
)
Try this:
<?php
$numbers = range(1,4);
shuffle($numbers);
$test = array();
foreach($numbers as $k=>$v){
$test[$k] = $v;
}
echo "<pre>";
print_r($test);
?>
This will give you the output as:
Array
(
[0] => 3
[1] => 4
[2] => 2
[3] => 1
)
After that you can do:
$myvar["first"] = $test[0];
$myvar["second"] = $test[1];
$myvar["third"] = $test[2];
$myvar["fourth"] = $test[3];
Every array has a key, value pair, if you have an array say:
$myarr = array("a", "b", "c");
then you can access the value "a" as $myarr[0], "b" as $myarr[1] and so on.
In the for loop I am looping through the array with their key and value, this will not only give you the key of the array but also the value associated with that key.
More on Array
Edit:
Improving what Luthando Loot answered:
<?php
$numbers = range(1,4);//generate four numbers
shuffle($numbers);//shuffle them
$test = array();//create array for the results
$words = array("first", "second", "third", "fourth"); //create your array keys
$i = 0;
foreach($numbers as $number){
$test[$words[$i]] = $number;//add your array keys & values
$i++;
}
echo "<pre>";
print_r($test); //show your results
?>
Output:
Array
(
[first] => 4
[second] => 3
[third] => 2
[fourth] => 1
)
use this way
$numbers[0];
$numbers[1];
$numbers[2];
$numbers[3];
Firstly make an array of keys as
$key = ['first','second','third','fourth'];
And then you can simply use array_combine as
$numbers = range(1,4);
shuffle($numbers);
$key = ['first','second','third','fourth'];
$result = array_combine($key,$numbers);
Demo
How to access all the elements under each key of multidimensional array.
$multi = array
(
"Abhishek" => array("Choudhary", "Bunta", "Popy"),
"Bond" => array("One", "two", "three", "four"),
"Super" => array("T1", "T2")
);
$data = array("Abhishek","Bond","Super");
for($j = 0;$j<count($data);$j++)
{
echo "<br/>Main Array Value ".$data[$j]."<br/>";
for($i = 0;$i<count($data[$j]);$i++)
{
echo "sub Value ".$multi[$data[$j]][$i]." count ".count($data[$j]) ;
}
}
Now I want to iterate through each element of Abhishek , Bond and Super , so we can see Abhishek has 3 elements inside it but $data[$j] always return 1. If I increment then I can access Bunta
Currently the output is -
Main Array Value Abhishek
sub Value Bunta
Main Array Value Bond
sub Value two
Main Array Value Super
sub Value T2
and expected is:
**
Main Array Value Abhishek
sub Value choudhary
sub Value Bunta
sub Value Popy
:
:
Main Array Value Bond
sub Value two
Main Array Value Super
sub Value T2
**
Disclaimer : I am super new to PHP so may be my expectation can be invalid or I am missing some very silly thing.
i recommend you read some articles about multidim arrays, anyway your needs could be done with following code:
foreach($multi as $key => $value) {
echo "<br/>Main Array Value ".$key."<br/>";
for($i = 0; $i < sizeof($value); $i++) {
echo "sub Value ".$value[$i]." count ".sizeof($value) ;
}
}
PS: you don't need $data array
#bunta please check this out: PHP Foreach
You could use foreach instead.
Also:
PHP foreach loop through multidimensional array
HTH.
Using foreach() would be easier
foreach ($multi as $key => $subarray)
{
echo $key . '<br />';
foreach ($subarray as $subvalue)
{
echo ' - '.$subvalue . '<br />';
}
}
Will output
Abhishek
- Choudhary
- Bunta
- Popy
Bond
- One
- two
- three
- four
Super
- T1
- T2
Try this :
<?php
foreach($multi as $key => $value) {
echo "<br/>Parent Value ".$key."<br/>";
for($i = 0; $ < sizeof($value); $++) {
echo "Child Value ".$value[$i]." count ".sizeof($value) ;
}
}
?>
You are using wrong syntax to access it.
Thanks
All you need is use foreach to iterate on $multi array (if you just want to know the number of subelements for each element level 1):
<?php
echo "<br\>multiDimensional Array<br\>";
$multi = array("Abhishek" =>array
("Choudhary",
"Bunta",
"Popy"),
"Bond" => array
("One",
"two",
"three",
"four"),
"Super" => array
("T1",
"T2")
);
foreach( $multi as $value ){
echo " count ".count($value) ;
}
I have 2 arrays - the first one is output first in full. The 2nd one may have some values that were already used/output with the first array. I want to "clean up" the 2nd array so that I can output its data without worrying about showing duplicates. Just to be sure I have the terminology right & don't have some sort of "array within an array", this is how I access each one:
1st Array
$firstResponse = $sth->fetchAll();
foreach ($firstResponse as $firstResponseItem) {
echo $firstResponseItem['samecolumnname']; // Don't care if it's in 2nd array
}
2nd Array
while( $secondResponseRow = $dbRequest->fetch_assoc() ){
$secondResponseArray = array($secondResponseRow);
foreach ($secondResponseArray as $secondResponseItem){
echo $secondResponseItem['samecolumnname']; //This can't match anything above
}
}
Thanks!
For example:
$response_names = array();
$firstResponse = $sth->fetchAll();
foreach ($firstResponse as $firstResponseItem)
$response_names[] = $firstResponseItem['samecolumnname'];
while( $secondResponseRow = $dbRequest->fetch_assoc() ){
$secondResponseArray = array($secondResponseRow);
foreach ($secondResponseArray as $secondResponseItem) {
if (!in_array($secondResponseItem['samecolumnname'], $response_names))
$response_names[] = $secondResponseItem['samecolumnname'];
}
}
array_walk($response_names, function($value) { echo $value . '<br />' });
If I understand what you're looking to do and the arrays are in the same scope, this should work.
$secondResponseArray = array($secondResponseRow);
$secondResponseArray = array_diff($secondResponseArray, $firstResponse);
//secondResponseArray now contains only unique items
foreach ($secondResponseArray as $secondResponseItem){
echo $secondResponseItem['samecolumnname'];
}
If you know that the keys of duplicate values will be the same you could use array_diff_assoc to get the items of the first array that aren't in the other supplied arrays.
This code
<?php
$a = array('abc', 'def', 'ghi', 'adg');
$b = array('abc', 'hfs', 'toast', 'adgi');
$r = array_diff_assoc($b, $a);
print_r($a);
print_r($r);
produces the following output
[kernel#~]php so_1.php
Array
(
[0] => abc
[1] => def
[2] => ghi
[3] => adg
)
Array
(
[1] => hfs
[2] => toast
[3] => adgi
)
[kernel#~]
I want to print this array to all indexes upto 21, but in this code this is printing only to array length, what i should i do the print whole array in for loop?
<?php
$array=array(0=>"hello",
1=>"world",
2=>"this",
3=>"is",
4=>"an",
20=>"array",
21=>"code" );
$length=count($array);
for($i=0;$i<$length;$i++){
echo "$i=>".$array[$i];
echo "<br />";
}
?>
Your difficulty is the way you're defining your array:
$array=array(0=>"hello",
1=>"world",
2=>"this",
3=>"is",
4=>"an",
20=>"array",
21=>"code" );
Arrays in php are really hashmaps; when you call index 5 on the above array, it is undefined. No index item up to 20 will be defined, and these will Notice out:
PHP Notice: Undefined offset: 5
Because you're using array length as your iterating variable, and calling exactly that variable, you will never get positions 20 and 21 in your code.
This is what your array looks like to the computer:
0 => "hello"
1 => "world"
2 => "this"
3 => "is"
4 => "an"
5 => NULL
6 => NULL
7 => NULL
... //elided for succinctness
19 => NULL
20 => "array"
21 => "code"
When you call $array[7] it can't return anything. When you call $array[20] it will return "array".
What you really want is a foreach loop:
foreach($array as $key => $val) {
//key will be one of { 0..4, 20..21}
echo "$key is $value\n";
}
Resulting in:
$ php test.php
0 is hello
1 is world
2 is this
3 is is
4 is an
20 is array
21 is code
If you must use a for loop:
$key_array = array_keys($array);
for($i=0;$i<count($key_array);$i++){
$key = $key_array[$i];
echo "$key => ".$array[$key]."\n";
}
Note this is not a clean solution.
Solution with a for loop:
$array=array(0=>"hello",
1=>"world",
2=>"this",
3=>"is",
4=>"an",
20=>"array",
21=>"code" );
$max = max(array_flip($array)); // What if max array key is 10^5 ?
for($i=0;$i<=$max;$i++){
if(isset($array[$i])){
echo "$i=>".$array[$i]."<br>";
}
}
foreach($array as $key=>$value){
echo $key."=>".$value;
echo "<br />";
}
You want to start your loop with $i=0 as PHP uses zero indexing. also in your loop you want to cap your max value for interation at $i
<?php
$array=array(0=>"hello",
1=>"world",
2=>"this",
3=>"is",
4=>"an",
20=>"array",
21=>"code" );
$length=count($array);
for($i=0;$i<$length;$i++){
echo "$i=>".$array[$i];
echo "<br />";
}
?>
I have this array:
Array ( [#LFC] => 1 [#cafc] => 2 [#SkySports] => 1)
How do i display it like this on a page? (preferably in value descending order as below):
\#cafc (2), #LFC (1), #SkySports (1)
Thanks
First, sort the array
arsort($arrayName);
Next, iterate througth the array keys and values.
foreach($arrayName as $key => $value)
{
echo "$key ($value),";
}
Try using arsort to sort by descending value and then looping through the array, printing key/value pairs, as follows:
arsort($original_array);
foreach($original_array as $k => $v) {
echo $k.'('.$v.')';
}
if i got your question right, use a foreach loop in combination with arsort:
arsort($array);
foreach($array as $k => $v) {
printf('%s (%s)',
htmlspecialchars($k),
htmlspecialchars($v));
}
arsort($array);
$output = array();
foreach($array as $k => $v) {
$output[] = "$k ($v)";
}
print implode(", ", $output);
this will sort the array in reverse order, then create a new array with the data formatted the way you like, then implodes the output into a string separated by commas. The other answers so far will leave a dangling comma.