php 数组查询
php 数组查询<?php
function arr_search ( $array, $expression ) {
$result = array();
$expression = preg_replace ( "/([^/s]+?)(=|<|>|!)/", "/$a['$1']$2", $expression );
foreach ( $array as $a ) if ( eval ( "return $expression;" ) ) $result[] = $a;
return $result;
}
$data = array (
array ( "name" => "bill", "age" => 40 ),
array ( "name" => "john", "age" => 30 ),
array ( "name" => "jack", "age" => 50 ),
array ( "name" => "john", "age" => 25 )
);
print_r ( arr_search ( $data, "age>=30" ) );
print_r ( arr_search ( $data, "name=='john'" ) );
print_r ( arr_search ( $data, "age>25 and name=='john'" ) );
?>
-- results --
Array
(
=> Array
(
=> bill
=> 40
)
=> Array
(
=> john
=> 30
)
=> Array
(
=> jack
=> 50
)
)
Array
(
=> Array
(
=> john
=> 30
)
=> Array
(
=> john
=> 25
)
)
Array
(
=> Array
(
=> john
=> 30
)
)
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