PHP Foreach Loop Key Value

PHP foreach loop key value

You can access your array keys like so:

foreach ($array as $key => $value)

get the next key in array in php foreach loop

<select>

<?php 
foreach ($make as $key => $make):
?>
      <option value="<?php echo $key + 1; ?> - <?php echo $key; ?>"> 
<?php echo $make; 
?>
</option>
<?php 
endforeach; 

Just increment the $key by 1, and you will have the next array element if the keys are in order and are numeric.

php: display key and value for each element of associative array

Please read the manual. You can use foreach with the key as well like a so:

$ar = array("A" => "one", "B" => "two", "C" => "three");
foreach ($ar as $key => $value) {
    print $key . ' => ' . $value . PHP_EOL;
}

Difference between as $key = $value and as $value in PHP foreach

Well, the $key => $value in the foreach loop refers to the key-value pairs in associative arrays, where the key serves as the index to determine the value instead of a number like 0,1,2,... In PHP, associative arrays look like this:

$featured = array('key1' => 'value1', 'key2' => 'value2', etc.);

In the PHP code: $featured is the associative array being looped through, and as $key => $value means that each time the loop runs and selects a key-value pair from the array, it stores the key in the local $key variable to use inside the loop block and the value in the local $value variable. So for our example array above, the foreach loop would reach the first key-value pair, and if you specified as $key => $value, it would store 'key1' in the $key variable and 'value1' in the $value variable.

Since you don't use the $key variable inside your loop block, adding it or removing it doesn't change the output of the loop, but it's best to include the key-value pair to show that it's an associative array.

Also note that the as $key => $value designation is arbitrary. You could replace that with as $foo => $bar and it would work fine as long as you changed the variable references inside the loop block to the new variables, $foo and $bar. But making them $key and $value helps to keep track of what they mean.

foreach loop on 3 key value array at the same time

I resolved like this:

if($request->hasfile('form')){ //form is an associative array of N textInput
$input = $request->all('form');
$Keys = array_keys($input['form']); //we get the name of all array keys because we dont know their name or how many they are as they are generated as the user adds categories in the database
foreach($Keys as $Key)
    $storagePath = Storage::put($path . $Key ,$input['form'][$Key]); //as we loop on key we get the value of the textInput with name form[$key] and store its value
}

foreach loop to print key value pairs while imploding the nested arrays

In case of array you need to assign the result of implode to a variable:

foreach($cleanedArray as $key => $value) {
  if (is_array($value)){
     // here
     $value = implode(', ', $value);
  } 
  echo "$key: $value <br>";
}  

Search for dynamic key values in foreach loop in php

I'm not sure what your original code was trying for; you appeared to be treating the array key like an array itself? Using a variable variable? Anyway, you just need a simple string search of the key. You can use regular expressions or whatever you like for more complex matching.

<?php
$rec_items = ["foo"=>12, "bar"=>34, "title1"=>56, "title2"=>78, "baz"=>90];
foreach ($rec_items as $k=>$v) {
    if (strpos($k, "title") === 0) {
        echo "$k = $v\n";
    }
}

Output:

title1 = 56
title2 = 78

My foreach loop is not retrieving the key value pairs even though Javascript sends the correct data

you are doing the concatenation wrong I think,

$fields = $request->fields;
$a = '';
foreach ($fields as $field){
    foreach ($field as $key => $value) {
        $a .= " value of " . $key . " is " . is_string($value) ? $value : 
        implode(', ',$value);
    }
}
return $a;

---

Related Topics