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Jan 16, 2012 · Use the in_array() function. echo 'this array contains kitchen'; Note: It is not necessary that all the elements of a PHP array should be of same data type. They can be of different data types. If you want to match the data type too then pass true as the third argument of in_array.
Mar 19, 2010 · A somewhat dirty method is to use PHP >= 5.2's native JSON functions to encode to JSON and then decode back to an array. This will not include private and protected members, however, and is not suitable for objects that contain data that cannot be JSON encoded (such as binary data).
array_key_exists() is SLOW compared to isset(). A combination of these two (see below code) would help. It takes the performance advantage of isset() while maintaining the correct checking result (i.e. return TRUE even when the array element is NULL)
Dec 22, 2023 · 5. You can test whether an array has a certain element at all or not with isset () or sometimes even better array_key_exists () (the documentation explains the differences). If you can't be sure if the array has an element with the index 'say' you should test that first or you might get 'warning: undefined index....' messages. As for the test ...
I have two arrays in PHP as follows: People: Array ( [0] => 3 [1] => 20 ) Wanted Criminals: Array ( [0] => 2 [1] => 4 [2] => 8 [3] => 11 [4] => 12 ...
This is the first function of this type that I found in the php manual for in_array. Functions in the ...
Aug 14, 2020 · PHP: Adding an element in array in foreach loop. 2. Populate multidimensional array with data. 0. how to ...
Dec 17, 2009 · PHP 7.3 added two functions for getting the first and the last key of an array directly without modification of the original array and without creating any temporary objects: array_key_first; array_key_last "There are several ways to provide this functionality for versions prior to PHP 7.3.0.
Nov 6, 2011 · PHP Collective Join the discussion This question is in a collective: a subcommunity defined by tags with relevant content and experts. The Overflow Blog
Sep 25, 2011 · In PHP, the in_array() function only allows for checking the presence of a single value. How do I check for multiple values at the same time? Please provide the answer for both cases: Checking if all values are present in the array; Checking if at least one value is present in the array
