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array_keys() 函数

　　函数返回包含数组中所有键名的一个新数组

$a=array("Volvo"=>"XC90","BMW"=>"X5","Toyota"=>"Highlander");
print_r(array_keys($a));
Array ( [0] => Volvo [1] => BMW [2] => Toyota )

$a=array("Volvo"=>"XC90","BMW"=>"X5","Toyota"=>"Highlander");
print_r(array_keys($a,"Highlander"));
Array ( [0] => Toyota )

$a=array(10,20,30,"10");
print_r(array_keys($a,"10",true));
Array ( [0] => 3 )

$a=array(10,20,30,"10");
print_r(array_keys($a,"10",false));
Array ( [0] => 0 [1] => 3 )

php常用函数

标签：php常用函数   返回   key   php   nbsp   bsp   常用   lan   [1]   

原文地址：http://www.cnblogs.com/jsonphp/p/7753338.html