php 数组查询

maxc1017

　　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
(
[0] => Array
(
[name] => bill
[age] => 40
)

[1] => Array
(
[name] => john
[age] => 30
)

[2] => Array
(
[name] => jack
[age] => 50
)

)
Array
(
[0] => Array
(
[name] => john
[age] => 30
)

[1] => Array
(
[name] => john
[age] => 25
)

)
Array
(
[0] => Array
(
[name] => john
[age] => 30
)

)