Php deletes duplicate array elements and empty element code

Php can delete an array by using the following two methods:

1. Traverse the array and determine whether the element value is specified. If so, use unset () to delete it. The sample code is as follows:

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// $ Var is the element value to be deleted, and $ array is the target array; Function array_del ($ var, $ array ){ $ I = 0; Foreach ($ array as $ val ){ If ($ var = $ val ){ Unset ($ array [$ I]); Break;   } $ I ++;  } Return $ array; }

2. Use the array_flip () function to reverse the key name and value. The sample code is as follows:

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<? Php $ A = array ('php', 'css ', 'Java', 'html', 'jquery '); $ A = array_flip ($ a); // reverse the key name and value Unset ($ a ['HTML ']); // deletes a specified value element. $ A = array_flip ($ a); // reverse the array again to restore the key name and value of the array. Var_dump ($ ); ?>

Delete an empty element from an array

Instance:

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<? Php $ Array = ('a' => "abc", 'B' => "bcd", 'C' => "cde", 'D' => "def ", 'E' => ""); Array_filter ($ array ); Echo "<pre> "; Print_r ($ array ); ?> Result: Array ( [A] => abc [B] => bcd [C] => cde [D] => def    )

Removes empty and repeated elements from the array.

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<? Php $ Array = array ('2', 19,33, 88,2, 99, '', 33 ,''); Function delArrayRepeat ($ arr ){ If (is_array ($ arr )){ $ Arr = array_unique ($ arr ); Foreach ($ arr as $ k =>$ v ){ If ($ v = ''){ Unset ($ arr [$ k]);    }   } $ Result = $ arr; } Else { $ Result = "The parameter must be an array! ";  } Return $ result; } $ Res = delArrayRepeat ($ array ); Print_r ($ res ); ?>