i can loop through 2 elements in an array , but here im having trouble looping through 3 elements .
this is my example :
$y = array('cod=>102,subcod=>10201,name=>"blabla"',
'cod=>103,subcod=>10202,name=>"blibli"',
'cod=>103,subcod=>10202,name=>"bblubl"')
my desire result is how to get the value of cod and subcod and name of every line .
I tried this :
foreach ($y as $v) {
echo $v['cod'] ;
echo $v['subcod'];
echo $v['name'] ;
}
but didnt work , im getting this error : Warning: Illegal string offset 'cod' and same error for every offset .
any help would be much apreciated.
If you can't change you're array
Then you need to format that and then use the loop and get the value.
function format_my_array($arg) {
$new = array();
foreach( $arg as $n => $v ) {
// splitting string like
// 'cod=>102,subcod=>10201,name=>"blabla"'
// by comma
$parts = explode(',', $v);
$new[$n] = array();
foreach( $parts as $p ) {
// splittin again by '=>' to get key/value pair
$p = explode('=>', trim($p));
$new[$n][$p[0]] = $p[1];
}
}
return $new;
}
$new_y = format_my_array($y);
foreach( $new_y as $v ) {
echo $v['cod'];
echo $v['subcod'];
echo $v['name'];
}
Related
I have an array like this:
$aMyArray = array(
"bmw"=>"user1",
"audi"=>"user2",
"mercedes"=>"user3"
);
And I only want to show the first two elements bmw=>user1 and audi=>user2.
But I want it by using a foreach loop.
If you want the first 2 by name:
Using in_array (documentation) is what you looking for:
$aMyArray = array("bmw"=>"user1", "audi"=>"user2", "mercedes"=>"user3");
$valuesToPrint = array("bmw", "audi");
foreach($aMyArray as $key => $val) {
if (in_array($key, $valuesToPrint))
echo "Found: $key => $val" . PHP_EOL;
}
If you want the first 2 by index use:
init index at 0 and increment in each iteration as:
$aMyArray = array("bmw"=>"user1", "audi"=>"user2", "mercedes"=>"user3");
$i = 0;
foreach($aMyArray as $key => $val) {
echo "Found: $key => $val" . PHP_EOL;
if (++$i > 1)
break;
}
$counter = 1;
$max = 2;
foreach ($aMyArray as $key => $value) {
echo $key, "=>", $value;
$counter++;
if ($counter === $max) {
break;
}
}
It is important to break execution to avoid arrays of any size looping until the end for no reason.
<?php
$aMyArray = array(
"bmw"=>"user1",
"audi"=>"user2",
"mercedes"=>"user3"
);
reset($aMyArray);
echo key($aMyArray).' = '.current($aMyArray)."\n";
next($aMyArray);
echo key($aMyArray).' = '.current($aMyArray)."\n";
Easiest way:
$aMyArray=array("bmw"=>"user1","audi"=>"user2","mercedes"=>"user3");
$i=0;
foreach ($aMyArray as $key => $value) {
if($i<2)
{
echo $key . 'and' . $value;
}
$i++;
}
I know you're asking how to do it in a foreach, but another option is using array travelling functions current and next.
$aMyArray = array(
"bmw"=>"user1",
"audi"=>"user2",
"mercedes"=>"user3"
);
$keys = array_keys($aMyArray);
//current($array) will return the value of the current record in the array. At this point that will be the first record
$first = sprintf('%s - %s', current($keys), current($aMyArray)); //bmw - user1
//move the pointer to the next record in both $keys and $aMyArray
next($aMyArray);
next($keys);
//current($array) will now return the contents of the second element.
$second = sprintf('%s - %s', current($keys), current($aMyArray)); //audi - user2
You are looking for something like this
$aMyArray = array(
"bmw"=>"user1",
"audi"=>"user2",
"mercedes"=>"user3"
);
foreach($aMyArray as $k=>$v){
echo $v;
if($k=='audi'){
break;
}
}
I have a string with a variable number of key names in brackets, example:
$str = '[key][subkey][otherkey]';
I need to make a multidimensional array that has the same keys represented in the string ($value is just a string value of no importance here):
$arr = [ 'key' => [ 'subkey' => [ 'otherkey' => $value ] ] ];
Or if you prefer this other notation:
$arr['key']['subkey']['otherkey'] = $value;
So ideally I would like to append array keys as I would do with strings, but that is not possible as far as I know. I don't think array_push() can help here. At first I thought I could use a regex to grab the values in square brackets from my string:
preg_match_all( '/\[([^\]]*)\]/', $str, $has_keys, PREG_PATTERN_ORDER );
But I would just have a non associative array without any hierarchy, that is no use to me.
So I came up with something along these lines:
$str = '[key][subkey][otherkey]';
$value = 'my_value';
$arr = [];
preg_match_all( '/\[([^\]]*)\]/', $str, $has_keys, PREG_PATTERN_ORDER );
if ( isset( $has_keys[1] ) ) {
$keys = $has_keys[1];
$k = count( $keys );
if ( $k > 1 ) {
for ( $i=0; $i<$k-1; $i++ ) {
$arr[$keys[$i]] = walk_keys( $keys, $i+1, $value );
}
} else {
$arr[$keys[0]] = $value;
}
$arr = array_slice( $arr, 0, 1 );
}
var_dump($arr);
function walk_keys( $keys, $i, $value ) {
$a = '';
if ( isset( $keys[$i+1] ) ) {
$a[$keys[$i]] = walk_keys( $keys, $i+1, $value );
} else {
$a[$keys[$i]] = $value;
}
return $a;
}
Now, this "works" (also if the string has a different number of 'keys') but to me it looks ugly and overcomplicated. Is there a better way to do this?
I always worry when I see preg_* and such a simple pattern to work with. I would probably go with something like this if you're confident in the format of $str
<?php
// initialize variables
$str = '[key][subkey][otherkey]';
$val = 'my value';
$arr = [];
// Get the keys we want to assign
$keys = explode('][', trim($str, '[]'));
// Get a reference to where we start
$curr = &$arr;
// Loops over keys
foreach($keys as $key) {
// get the reference for this key
$curr = &$curr[$key];
}
// Assign the value to our last reference
$curr = $val;
// visualize the output, so we know its right
var_dump($arr);
I've come up with a simple loop using array_combine():
$in = '[key][subkey][otherkey][subotherkey][foo]';
$value = 'works';
$output = [];
if(preg_match_all('~\[(.*?)\]~s', $in, $m)) { // Check if we got a match
$n_matches = count($m[1]); // Count them
$tmp = $value;
for($i = $n_matches - 1; $i >= 0; $i--) { // Loop through them in reverse order
$tmp = array_combine([$m[1][$i]], [$tmp]); // put $m[1][$i] as key and $tmp as value
}
$output = $tmp;
} else {
echo 'no matches';
}
print_r($output);
The output:
Array
(
[key] => Array
(
[subkey] => Array
(
[otherkey] => Array
(
[subotherkey] => Array
(
[foo] => works
)
)
)
)
)
Online demo
I'm having some trouble understanding the coding in PHP, when it comes to multidimensional arrays and how to push.
The idea is to push a "Attribute" and a "Attribute value"
I have tried the formula below
$i = 0;
$array = array();
foreach($node as $a)
{
$strAtt = $node->PROP[$i]->attributes();
$strVal = $node->PROP[$i]->PVAL;
$output = $output.$strAtt." : ".$strVal."<BR>";
$array[] = ($strAtt => $strVal);
The $array[] = ($strAtt => $strVal); doesnt give me much success.
I have tried array_push($array, $strAtt => $strVal) - no luck..
As an extra questions, how do I loop trough the array and print me multidimensional values ?.
NEW CODE
while ($z->name === 'RECORD')
{
$node = new SimpleXMLElement($z->readOuterXML());
$Print = FALSE;
$output = "";
$i = 0;
foreach($node as $a)
{
$strAtt = $node->PROP[$i]->attributes();
$strVal = $node->PROP[$i]->PVAL;
$output = $output.$strAtt." : ".$strVal."<BR>";
$array[$strAtt] = $strVal;
if(($i == 6) && ($node->PROP[$i]->PVAL == $ProductLookup))
{
$Print = TRUE;
$Product = $node->PROP[$i]->PVAL;
}
$i++;
}
if($Print == TRUE) {
echo $output;
echo "Product : ".$Product."<br>";
var_dump($array);
}
//print_r($array);
$print = FALSE;
// go to next <product />
$z->next('RECORD');
}
New code added. For some reason my $array is totally empty when i dump it, although my $Output is full of text ?
It sounds like you are wanting an "associative" array and not necessarily a multi-dimensional array. For associative arrays you don't use array_push. Just do this:
$array[$strAtt] = $strVal;
Then to loop the array just do this:
foreach ($array as $key => $value) {
echo "$key = $value\n";
}
Go through array in php , you will understand how array works in php.
Besides if you want to add an element to a multidimensional array you can achieve like this :
$node = array ("key1"=> array (a,b) , "key2"=> array (c,d));
$array = array();
foreach ($node as $key=>$value) {
$array [$key] = $value;
}
This will be the resulting $array after the loop :
array (
"key1"=> array (
a,b
) ,
"key2"=>
array (c,d)
)
Hope that helps , happy coding :)
foreach( $tabs2 as $tab2 => $name ){
$class = ( $tab2 == $current ) ? ' current' : '';
echo("<li class='posts'><a href='?page=pigg&tab=help&tab2=$tab2' class='$class'>$name");
echo(' |'); // If array last then do not display
echo('</a></li>');
}
I'm using a foreach loop to create a navigation for a WordPress plugin I'm working on, but I don't want the ' |' to be displayed for the last element, the code above is what I've got so far, I was thinking of using an if statement on the commented line, but not sure what the best approach would be, any ideas? Thanks!
The end() function is what you need:
if(end($tabs2) !== $name){
echo ' |'; // not the last element
}
I find it easier to check for first, rather than last. So I'd do it this way instead.
$first = true;
foreach( $tabs2 as $tab2 => $name ){
if ($first) {
$first = false;
} else {
echo(' | ');
}
$class = ( $tab2 == $current ) ? ' current' : '';
echo("<li class='posts'><a href='?page=pigg&tab=help&tab2=$tab2' class='$class'>$name</a></li>");
}
I also combined the last two echos together.
First thing you need to find out what is the last key of the array, and doing so by finding the array length, using the count() function.
Afterwords we gonna create a counter and add +1 on every loop.
If the counter and the last key are equal then it is the last key.
$last = count($array);
$counter = 1;
foreach ($array as $key => $val){
if ($counter != $last){
// all keys but the last one
// do something
$counter++; // add one to counter count
}
else {
// this is for the last key
}// end else
}// end foreach
I would do this way:
$arrLi = array();
foreach( $tabs2 as $tab2 => $name ){
$class = ( $tab2 == $current ) ? ' current' : '';
$arrLi[] = "<li class='posts'><a href='?page=pigg&tab=help&tab2=$tab2' class='$class'>$name</a></li>";
}
echo implode('|', $arrLi);
end() is good function to use
foreach( $tabs2 as $tab2 => $name ){
if(end($tabs2)== $name)
echo "|";
}
or you can do it manually for more understanding
$copyofarry = $tabs2;
$last = array_pop($copyofarry);
foreach( $tabs2 as $tab2 => $name ){
if($last == $name)
echo "|";
}
Something like this is possible:
$size = count($tabs2);
$counter = 0;
foreach( $tabs2 as $tab2 => $name ){
$class = ( $tab2 == $current ) ? ' current' : '';
echo("<li class='posts'><a href='?page=pigg&tab=help&tab2=$tab2' class='$class'>$name");
if ( ++$counter < $size ){
echo(' |'); // If array last then do not display
}
echo('</a></li>');
}
Why not pop the last element first? So you do not need to check if the current element is the last element in each iteration.
The function array_pop(&$array) returns the last element and removes it from the array.
<div id="breadcrumb">
<?php
$lastBreadcrumb = array_pop($breadcrumb);
foreach ($breadcrumb as $crumb){ ?>
<?php echo $crumb; ?>
<?php } ?><span><?php echo $lastBreadcrumb?></span>
</div>
How do I get the current index in a foreach loop?
foreach ($arr as $key => $val)
{
// How do I get the index?
// How do I get the first element in an associative array?
}
In your sample code, it would just be $key.
If you want to know, for example, if this is the first, second, or ith iteration of the loop, this is your only option:
$i = -1;
foreach($arr as $val) {
$i++;
//$i is now the index. if $i == 0, then this is the first element.
...
}
Of course, this doesn't mean that $val == $arr[$i] because the array could be an associative array.
This is the most exhaustive answer so far and gets rid of the need for a $i variable floating around. It is a combo of Kip and Gnarf's answers.
$array = array( 'cat' => 'meow', 'dog' => 'woof', 'cow' => 'moo', 'computer' => 'beep' );
foreach( array_keys( $array ) as $index=>$key ) {
// display the current index + key + value
echo $index . ':' . $key . $array[$key];
// first index
if ( $index == 0 ) {
echo ' -- This is the first element in the associative array';
}
// last index
if ( $index == count( $array ) - 1 ) {
echo ' -- This is the last element in the associative array';
}
echo '<br>';
}
Hope it helps someone.
foreach($array as $key=>$value) {
// do stuff
}
$key is the index of each $array element
$i = 0;
foreach ($arr as $key => $val) {
if ($i === 0) {
// first index
}
// current index is $i
$i++;
}
The current index is the value of $key. And for the other question, you can also use:
current($arr)
to get the first element of any array, assuming that you aren't using the next(), prev() or other functions to change the internal pointer of the array.
You can get the index value with this
foreach ($arr as $key => $val)
{
$key = (int) $key;
//With the variable $key you can get access to the current array index
//You can use $val[$key] to
}
$key is the index for the current array element, and $val is the value of that array element.
The first element has an index of 0. Therefore, to access it, use $arr[0]
To get the first element of the array, use this
$firstFound = false;
foreach($arr as $key=>$val)
{
if (!$firstFound)
$first = $val;
else
$firstFound = true;
// do whatever you want here
}
// now ($first) has the value of the first element in the array
You could get the first element in the array_keys() function as well. Or array_search() the keys for the "index" of a key. If you are inside a foreach loop, the simple incrementing counter (suggested by kip or cletus) is probably your most efficient method though.
<?php
$array = array('test', '1', '2');
$keys = array_keys($array);
var_dump($keys[0]); // int(0)
$array = array('test'=>'something', 'test2'=>'something else');
$keys = array_keys($array);
var_dump(array_search("test2", $keys)); // int(1)
var_dump(array_search("test3", $keys)); // bool(false)
well since this is the first google hit for this problem:
function mb_tell(&$msg) {
if(count($msg) == 0) {
return 0;
}
//prev($msg);
$kv = each($msg);
if(!prev($msg)) {
end($msg);
print_r($kv);
return ($kv[0]+1);
}
print_r($kv);
return ($kv[0]);
}
based on #fabien-snauwaert's answer but simplified if you do not need the original key
$array = array( 'cat' => 'meow', 'dog' => 'woof', 'cow' => 'moo', 'computer' => 'beep' );
foreach( array_values( $array ) as $index=>$value ) {
// display the current index + value
echo $index . ':' . $value;
// first index
if ( $index == 0 ) {
echo ' -- This is the first element in the associative array';
}
// last index
if ( $index == count( $array ) - 1 ) {
echo ' -- This is the last element in the associative array';
}
echo '<br>';
}