php function

Time related

1.time(), you can get the timestamp of the current time.

2.strtotime(), you can convert a text type datetime into a timestamp.

3. Format output: For example, the output time is 01/31/2011

date('m/d/Y', timestamp).

Another example: date ('Y-m-d H:i:s', timestamp); 2011-01-31 04:20: 59.

Input and output related

echo sprintf("%.2f",0.24236); //Output: 0.24.

Get server host

$request Host = $_SERVER [ 'Http_host'];

$ CurrentPageurl = $ Requesthost. $ _Server ['PHP_SELF']; $ _FILES['photo']['tmp_name']);

img is an array, $img[0], $img[1] represent the width and height of the picture respectively.

img[3] represents the picture Type, related to jpg, gif, png.

files:

Get the suffix name of a file:

array_pop(explode (".",$file));

Array related:

array_push($array,$elem); Append $elem to the back of the array array.

array_merge($array1, $array2); Merge the two arrays into one. Note that if it is an associative array If so, items with the same key will be merged.

shuffle($array); will randomly shuffle the elements in the array.

string related:

explode(",", $ids) ; Convert a comma-separated string into an array.