10 recommended articles about php array_search() function

The array_search() function searches for a given value in the array and returns the key value if found, otherwise it returns false. Prior to PHP 4.2.0, functions returned null instead of false on failure. The syntax format is as follows mixed aarray_search(mixed needle, array haystack [, bool strict]) The parameter needle specifies the value to be searched in the array; the parameter haystack specifies the array to be searched; the parameter strict is an optional parameter. If the value is true, the array will be Check the type of a given value. The following example comprehensively applies array functions to update the values ​​of elements in the array. The specific example code is as follows:

1. How does PHP query the specified element in the array

Introduction: The array_search() function searches for a given value in the array and returns the key value if found, otherwise it returns false. Before PHP 4.2.0, the function returned null instead of null on failure. false.

##2. PHP Array Application Basics (5)

#Introduction: Summary: in_array() checks whether a certain value exists in the array, array_search() searches for a given value in the array, and returns the corresponding key name if successful, array_key_exists() checks the given Whether the key name exists in the array...

3.

How does PHP determine whether an element is in a known array

Introduction:: This article mainly introduces how PHP determines whether an element is in a known array. Students who are interested in PHP tutorials can refer to

##4.

Realize self-worth php How to remove array elements according to specified element values ​​

Introduction: Realize self-worth: Realize self-worth php How to remove array elements according to specified element values Implementation method: Remove the array elements according to the specified element value. Copy the code as follows:"Dog","b"=> "Cat","c"=>"Horse"); print_r($a); unset($a[array_search("Cat",$a)]);//array_search("Cat",$a) press The element value returns the key name. After removal, the index is retained print_r($a

##5. search.taobao.com PHP array function sequence array_search- Returns the key name by element value

Introduction: search.taobao.com:search.taobao.com PHP array function sequence array_search - Return key name by element value: array_search() definition and usage array_search() function Like in_array(), searches for a key value in the array. If the value is found, the key name of the matching element is returned. If not found, the function returns null on failure. instead of false. If the third parameter strict is specified as true, then only when the data type and value are consistent

6. nba2k online shooting skills php tips change the keys of the array Exchange with the value to form a new array, search the value to get the key

Introduction: nba2k online shooting skills: nba2k online shooting skills php tips exchange the keys and values ​​of the array to form Create a new array, search for the value and get the key: Copy the code as follows: $cityname = array_flip($city_DB[name]); //Exchange the keys and values ​​of the array to form a new array $city_name = array_search($city_id,$ cityname,true); //Find the value and get the key

7. php array_search function usage

Introduction:: PHP array_search function usage: Definition and usage array_search() function is the same as in_array(), searching for a key value in the array. If the value is found, the key of the matching element is returned. If not found, returns false. Prior to PHP 4.2.0, functions returned null instead of false on failure. If the third parameter strict is specified as true, the key name of the corresponding element will only be returned if the data type and value are consistent. Syntax array_search(value,array

8. January 06, 2016 bug library 2016-06-16

Introduction: January 06, 2016: 2016 January 06 bug library 2016-06-16: 1. About array_search and unset original code: public function appViewUnread($uid, $id){$userNewRepyKey = Config_CacheKey::USER_QUESTION_NEW_REPLY.$uid;$userNewReply = $this-> ;appGetUserNewReply($uid);$key = array_

9. PHP Searches for a given simple instance in an array array_search function

#Introduction:: PHP searches for a given simple instance in the array array_search function: array_search()PHP array_search() function is used to search for a given value in the array, and returns the corresponding key name if successful, otherwise Return FALSE. Syntax: mixed array_search( mixed needle, array array [, bool strict] ) Parameter description: Parameter description needle needs to search for the value in the array. If it is a string, it is case-sensitive. Array needs to retrieve the array strict. Optional, such as

10. php array string search array_search technique

Introduction:: php array string search array_search technique: php To search array strings, we generally use the two functions array_search and in_array. The array_search() function is the same as in_array(), and searches for a key value in the array. If the value is found, the key of the matching element is returned. If not found, returns false. But array_search is generally used to search for the first string that meets the requirements in an array. If the searched string contains multiple strings in the array, array_search will not work.

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