array_shift 但保存钥匙

reset/ $a /;

unset/ $a[ key/$a/]/;

// rewinds array's internal pointer to the first element

// and returns the value of the first array element. 

$value = reset/ $a /;



// returns the index element of the current array position

$key = key/ $a /;



unset/ $a[ $key ]/;

// returns value

function array_shift_assoc/ &$arr /{

 $val = reset/ $arr /;

 unset/ $arr[ key/ $arr / ] /;

 return $val; 

}



// returns [ key, value ]

function array_shift_assoc_kv/ &$arr /{

 $val = reset/ $arr /;

 $key = key/ $arr /;

 $ret = array/ $key => $val /;

 unset/ $arr[ $key ] /;

 return $ret; 

}

// 1 is the index of the first object to get

// NULL to get everything until the end

// true to preserve keys

$arValues = array_slice/$arValues, 1, NULL, true/;

function array_shift_associative/&$arr/{

 reset/$arr/;

 $return = array/key/$arr/=>current/$arr//;

 unset/$arr[key/$arr/]/;

 return $return; 

}

key=>value

$array = array/'1','2','3','4'/;



reset/$array/;

$key = key/$array/;

$value = $array[$key];

unset/$array[$key]/;



var_dump/$key, $value, $array, current/$array//;

int/0/ 

string/1/ "1" 

array/3/ { [1]=> string/1/ "2" [2]=> string/1/ "3" [3]=> string/1/ "4" }

string/1/ "2"