how to check empty array in php

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A full array of PHP operation methods

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

Php Programming Notes

: 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-small_123

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

PHP Programming notes Sharing

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

Differences between isset () and empty () in php

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.

Differences between isset () and empty () in PHP

Php Chinese network (www.php.cn) provides the most comprehensive basic tutorial on programming technology, introducing HTML, CSS, Javascript, Python, Java, Ruby, C, PHP, basic knowledge of MySQL and other programming languages. At the same time,

PHP empty () Check whether a variable is empty _php tips

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

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 Basics Summary (1) array, basic knowledge array_php Tutorial

PHP Basic Knowledge Summary (1) array of arrays, basics array First, sort1, Asort--positive sort, keep index relation2, Arsort--reverse sort, keep index relationship3. Sort-from lowest to highest4. Ksort-Sort by key name5. Krsort--Reverse Sort by

Php empty () check whether a variable is empty

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

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