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
: This article mainly introduces php programming notes. if you are interested in PHP tutorials, please refer to them. Three methods for php to obtain POST data
Php image watermarking source code
Php + ajax + json is the simplest example.
Php Chinese
Php programming notes-three methods for obtaining POST data from small_123 php
Php image watermarking source code
Php + ajax + json is the simplest example.
Php Chinese character to pinyin source code
Php traverses the Directory, generates the md5
Three ways to get post data from PHP
PHP image plus watermark source code
One of the simplest examples of Php+ajax+json
PHP Chinese Pinyin Source code
PHP iterates through directories, generates MD5 values for each file in the directory, and writes
empty-Check if a variable is empty
Statement a bug description
BOOL Empty (mixed $var)
Empty () returns FALSE if Var is a non-null or Non-zero value. In other words, "", 0, "0", NULL, FALSE, Array (), Var $var; and objects that do not have any
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 -
Empty-check whether a variable is empty
Report a bug description
Bool empty (mixed $ var)If var is a non-null or non-zero value, empty () returns FALSE. In other words, "", 0, "0", NULL, FALSE, array (), var $ var; and objects without any
Through learning the PHP language, you should know that it is a function-based HTML scripting language. The huge function library supports the implementation of PHP functions. Next we will introduce the usage of PHP functions isset () and empty.
PHPisset () and empty () usage differences. The isset () function of PHP is generally used to check whether the variable is set in the format boolisset (mixedvar [, mixedvar [,...]). function: checks whether a return value is set for a variable. if
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.