php array with key and value



a map is a type that associates values to keys. this type is optimized for several different uses; it can be treated as an array, list (vector), hash table (an implementation of a map), dictionary, collection, stack, queue, and probably more. as array values can be other arrays, trees and multidimensional arrays are also possible. if an associative array is used as the second parameter of array_fill_keys, then the associative array will be appended in all the values of the first array. e.g. <?php $array = array( "a" => "first", "b" => "second", "c" => "something", "red" ); $array = array( "a" => "first", "b" => "something", "letsc" ); print_r(array_fill_keys($array  if two keys are the same, the second one prevails. example: <?php print_r(array_combine(array('a','a','b'), array(,,))); ?> returns: array ( [a] => [b] => ) but if you need to keep all values, you can use the function below: <?php function array_combine_($keys, $values) { $result = array(); foreach ($keys as $i => $k) {

php array with key and value

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php array with key and value

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php array with key and value

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here's how to get the first key, the last key, the first value or the last value of a (hash) array without explicitly copying nor altering the original array: <?php $array = array('first'=>'', 'second'=>'', 'third'=>''); get the first key: returns 'first' print array_shift(array_keys($array)); get the last key: returns 'third' example . loop through and print all the values of an associative array: <?php $age=array("peter"=>"","ben"=>"","joe"=>""); foreach($age as $x=>$x_value) { echo "key=" . $x . ", value=" . $x_value; echo " "; } ?> run example »  nope, there is no array_push() equivalent for associative arrays because there is no way determine the next key. you'll have to use $arrayname[indexname] = $value;.

php array with key and value

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php array with key and value

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php array with key and value

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for some specific purposes you may want to know the current key of your array without going on a loop. in this case you could do the following: reset($array); echo key($array) . ' = ' . current($array);. the above example will show the key and the value of the first record of your array. the following functions  foreach($page as $key => $value) { echo "$key is at $value"; }. for 'without loop' version i'll just ask "why?". déc. you can access your array keys like so: foreach ($array as $key => $value). if you have a value and want to find the key, use array_search() like this: $arr = array ('first' => 'a', 'second' => 'b', ); $key = array_search ('a', $arr);. $key will now contain the key for value 'a' (that is, 'first' ).

php array with key and value

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php array with key and value

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php array with key and value

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php array with key and value

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