check array

basic functions of array manipulationThe key name and value of the arrayArray_values ($arr); Gets the value of the array Array_keys ($arr), gets the key name of the array array_flip ($arr), and the values in the array are exchanged with the key

Basic functions of array manipulationThe key name and value of the arrayArray_values ($arr); Get the value of an arrayArray_keys ($arr); Gets the key name of the arrayArray_flip ($arr); the values in the array are exchanged with the key names (if

/** * Determine whether the given object is an array: * Either an object array or a primitive array. @param obj the object to check */ Public Static Boolean IsArray (Object obj) { returnnull && obj.getclass (). IsArray (

Php basic knowledge Summary (1) array, basic knowledge array I. Sorting1. asort-Positive Sorting to maintain the index relationship2. arsort-reverse sorting to maintain the index relationship3. sort -- sorting from the lowest to the highest4. ksort -

PHP multi-dimensional array problem, a little difficult! Two arrays are as follows: // Registration information $ array1 = array (0 => array ('day' => '2017-3-7 ', // registration date 'data' => array (0 => array ('uid' => '123 '), 1 => array

Ange ($low, $high), Range ($low, $high, $step);//Create an array of sequential values such as: Range (1,4) as (1,2,3,4) and range (' A ', ' Z ') Each ($array) returns the current element of the array sequentially, and sets the next element to the

PHP operation array functions. Ange ($ low, $ high), range ($ low, $ high, $ step); create an array of sequential values, for example, range () is) for example, range (a, z) each ($ array) returns the current element of the array in sequence, and

Ange ($low, $high), Range ($low, $high, $step);//Create an array of sequential values such as range (1,4) (1,2,3,4) and range (' A ', ' Z ') Each ($array) returns the current element of the array sequentially and sets the next element to the

Ange ($low, $high), Range ($low, $high, $step);//Create an array of sequential values such as range (1,4) (1,2,3,4) and range (' A ', ' Z ') Each ($array) returns the current element of the array sequentially and sets the next element to the

Php operation array (merge, split, append, search, delete, etc ). 1. the array_merge () function combines the arrays and returns a Union array. The obtained array starts with the first input array parameter. 1. Merge arrays The array_merge ()