Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <pre><code>function extractData( array $data, $store = null ) { $callback = function( $values, $array ) use ( $store ) { // We require values for a particular store if( ! is_null( $store ) ) { if( $array[ 'store' ] == $store ) { return $array; } return false; } // Return the sum of all stores in a city else { // Toss out the city and store values since they're not needed unset( $array['city'], $array['store'] ); // Seed the initial values if( ! is_array( $values ) || empty( $values ) ) { return $array; } // array_map function used add the arrays $add = function( $a, $b ) { return $a + $b; }; // Add the arrays $summedArray = array_map( $add, $values, $array ); // Return the combined array structure return array_combine( array_keys( $values ), $summedArray ); } }; return array_reduce( $data, $callback, array() ); } $data = array( 0 =&gt; array( "city" =&gt; 309, "store" =&gt; 12, "apples" =&gt; 21, "oranges" =&gt; 14, "lichis" =&gt; 34 ), 1 =&gt; array( "city" =&gt; 309, "store" =&gt; 13, "apples" =&gt; 0, "oranges" =&gt; 11, "lichis" =&gt; 32 ), 2 =&gt; array( "city" =&gt; 309, "store" =&gt; 14, "apples" =&gt; 44, "oranges" =&gt; 61, "lichis" =&gt; 0 ), 3 =&gt; array( "city" =&gt; 309, "store" =&gt; 15, "apples" =&gt; 7, "oranges" =&gt; 0, "lichis" =&gt; 6 ), 4 =&gt; array( "city" =&gt; 309, "store" =&gt; 16, "apples" =&gt; 0, "oranges" =&gt; 0, "lichis" =&gt; 12 ) ); // Return the values for a particular store print_r( extractData( $data, 16 ) ); // Return the total of all stores in the city print_r( extractData( $data ) ); </code></pre> <p>Which would yield the following results...</p> <p><strong>Single City</strong></p> <pre><code>Array ( [city] =&gt; 309 [store] =&gt; 16 [apples] =&gt; 0 [oranges] =&gt; 0 [lichis] =&gt; 12 ) </code></pre> <p><strong>Totals</strong></p> <pre><code>Array ( [apples] =&gt; 72 [oranges] =&gt; 86 [lichis] =&gt; 84 ) </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POHow do I count the values of a specific key in a multi-dimensional array in PHP?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USwlvrn
    1. USwlvrn
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload