When I wrote PHP today, I encountered an array problem.

In {code...} PHP, how can we efficiently retrieve the first 10 of these arrays and determine the number of keys whose key is 333.

array (        22 => 3000,        1 => 2900,        8 => 2588,        11 => 2400,        6 => 2000,        30 => 1900,        39 => 1800,        25 => 1400,        40 => 1300,        100 => 1244,        15 => 1000,        69 => 900,        70 => 888,        3 => 666,        333 => 10 );

In PHP, how can such an array efficiently retrieve the first 10 and how can we calculate the number of keys with 333.

Reply content:

array (        22 => 3000,        1 => 2900,        8 => 2588,        11 => 2400,        6 => 2000,        30 => 1900,        39 => 1800,        25 => 1400,        40 => 1300,        100 => 1244,        15 => 1000,        69 => 900,        70 => 888,        3 => 666,        333 => 10 );

In PHP, how can such an array efficiently retrieve the first 10 and how can we calculate the number of keys with 333.

  3000, 1 => 2900, 8 => 2588, 11 => 2400, 6 => 2000, 30 => 1900, 39 => 1800, 25 => 1400, 40 => 1300,100 => 1244, 15 => 1000, 69 => 900, 70 => 888, 3 => 666,333 => 10 ); // use array_slice to extract the first 10 elements $ arr1 = array_slice ($ array, 0, 10, true); print_r ($ arr1 ); // obtain the location where the key is 333 through array_search $ pos = array_search (333, array_keys ($ array); echo $ pos + 1; // $ pos + 1 indicates the actual position, $ pos indicates the position in the array, and starts from 0.