php中数组的搜索程序代码

在php中简单数据搜索很简单我们直接使用in_array() 函数在数组中搜索给定的值即可，这种是简单的一维数据

例

 代码如下

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代码如下	复制代码
$people = array("Peter", "Joe", "Glenn", "Cleveland"); if (in_array("Glenn",$people)) { echo "Match found"; } else { echo "Match not found"; } ?>

$people = array("Peter", "Joe", "Glenn", "Cleveland");

if (in_array("Glenn",$people))

  {

  echo "Match found";
  }

else

  {
  echo "Match not found";

  }

?>

输出：

代码如下	复制代码
1 $fruit["apple"] = "red";  2 $fruit["banana"] = "yellow";  3 $fruit["pear"] = "green";  4 if(array_key_exists("apple", $fruit)){  5     printf("apple's color is %s",$fruit["apple"]);  6 }

Match found。

array_key_exists()函数

如果在一个数组中找到一个指定的键，函数array_key_exists()返回true，否则返回false。其形式如下：

1 boolean array_key_exists(mixed key,array array);

下面的例子将在数组键中搜索apple，如果找到，将输出这个水果的颜色：

代码如下	复制代码
$fruits["apple"] = "red"; $fruits["banana"] = "yellow"; $fruits["watermelon"]="green"; $founded = array_search("green", $fruits); if($founded)  printf("%s was founded on %s.",$founded, $fruits[$founded])

 

 代码如下

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代码如下	复制代码
$fruits["apple"] = "red"; $fruits["banana"] = "yellow"; $fruits["watermelon"]="green"; $keys = array_keys($fruits); print_r($keys);

1 $fruit["apple"] = "red"; 

2 $fruit["banana"] = "yellow"; 

3 $fruit["pear"] = "green"; 

4 if(array_key_exists("apple", $fruit)){ 

代码如下	复制代码
$foo[1]['a']['xx'] = 'bar 1'; $foo[1]['b']['xx'] = 'bar 2'; $foo[2]['a']['bb'] = 'bar 3'; $foo[2]['a']['yy'] = 'bar 4'; $foo[3]['c']['dd'] = 'bar 3'; $foo[3]['f']['gg'] = 'bar 3'; $foo['info'][1] = 'bar 5';

5     printf("apple's color is %s",$fruit["apple"]); 6 }

执行这段代码得到的结果：1 apple's color is redarray_search()函数

代码如下	复制代码
$fruits["apple"] = "red";$fruits["banana"] = "yellow";$fruits["watermelon"]="green";$founded = array_search("green", $fruits);if($founded) printf("%s was founded on %s.",$founded, $fruits[$founded])

array_keys()函数

代码如下	复制代码
$fruits["apple"] = "red";$fruits["banana"] = "yellow";$fruits["watermelon"]="green";$keys = array_keys($fruits);print_r($keys);

上面的方法都只能搜索一维数据，如果是多维数据就没办法了。1 php搜索多维数组的键值如下面例子:

代码如下	复制代码
$foo[1]['a']['xx'] = 'bar 1';$foo[1]['b']['xx'] = 'bar 2';$foo[2]['a']['bb'] = 'bar 3';$foo[2]['a']['yy'] = 'bar 4';$foo[3]['c']['dd'] = 'bar 3';$foo[3]['f']['gg'] = 'bar 3';$foo['info'][1] = 'bar 5';

如果要查找 bar 3 怎么进行查找呢。有三个结果，而这三个结果都要，看下面的函数：
-------------------------------------------------------------------------------------------------------------------------------

      $nodes_found[] = $nodes_temp;
    }}
return $nodes_found;

 代码如下

代码如下	复制代码
function array_search_re($needle, $haystack, $a=0, $nodes_temp=array()){ global $nodes_found; $a ; foreach ($haystack as $key1=>$value1) {     $nodes_temp[$a] = $key1;     if (is_array($value1)){         array_search_re($needle, $value1, $a, $nodes_temp);     }     else if ($value1 === $needle){       $nodes_found[] = $nodes_temp;     } } return $nodes_found; }

复制代码

function array_search_re($needle, $haystack, $a=0, $nodes_temp=array()){global $nodes_found;

代码如下	复制代码
$result = array_search_re('bar 3', $foo); print_r($result); 输出结果为如下： Array ( [0] => Array ( [1] => 2 [2] => a [3] => bb )           [1] => Array ( [1] => 3 [2] => c [3] => dd )           [2] => Array ( [1] => 3 [2] => f [3] => gg )         )

$a ;

foreach ($haystack as $key1=>$value1) {

    $nodes_temp[$a] = $key1;

代码如下

复制代码

function array_search_key($needle, $haystack){ global $nodes_found; foreach ($haystack as $key1=>$value1) {    if ($key1=== $needle){     $nodes_found[] = $value1;           }     if (is_array($value1)){         array_search_key($needle, $value1);     }       } return $nodes_found; } $result = array_search_key('a', $foo); print_r($result); 输出结果为如下：   Array (     [0] => Array         (             [xx] => bar 1         )     [1] => Array         (             [bb] => bar 3         )     [2] => Array         (             [yy] => bar 4         ) )

    if (is_array($value1)){  

      array_search_re($needle, $value1, $a, $nodes_temp);

    }

    else if ($value1 === $needle){

}

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这个函数就可以把上面要查找到的内容全部返回出键名来

 代码如下

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$result = array_search_re('bar 3', $foo);print_r($result);输出结果为如下：Array ( [0] => Array ( [1] => 2 [2] => a [3] => bb )          [1] => Array ( [1] => 3 [2] => c [3] => dd )          [2] => Array ( [1] => 3 [2] => f [3] => gg )        ) 1 php搜索多维数组的键名

代码如下

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function array_search_key($needle, $haystack){global $nodes_found;foreach ($haystack as $key1=>$value1) {  if ($key1=== $needle){   $nodes_found[] = $value1;         }    if (is_array($value1)){        array_search_key($needle, $value1);    }    }return $nodes_found;}$result = array_search_key('a', $foo);print_r($result);输出结果为如下： Array(    [0] => Array        (            [xx] => bar 1        )    [1] => Array        (            [bb] => bar 3        )    [2] => Array        (            [yy] => bar 4        )) 通过遍历我们可以实现多维数据搜索了。 教程链接:随意转载~但请保留教程地址★