array_keys( ) returns an array of all the keys in that array : array_keys « Data Structure « PHP

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PHP » Data Structure » array_keys 
array_keys( ) returns an array of all the keys in that array
 
array array_keys array arr [, mixed search [, bool strict]] )
<?
    $users[923'T';
    $users[100'S';
    $users[1202'C';
    $userids = array_keys($users);


    $users[923'T';
    $users[100'S';
    $users[1202'C';
    $userids = array_keys($users, "T");
?>
  
  
Related examples in the same category
1. Outputting Using array_values() and array_keys() for Backward Compatibility
2. Return all the keys of an array with array array_keys (array input [, mixed search_value])
3. array_keys() function returns an array containing all keys
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