Array have value php

in_array() in PHP | Array Value Exists, Associative/Multidimensional

The in_array() example here. Basically array function searches any specific value from the array. Here, We provide in_array in PHP as well as added another example for array value exists with the help index array.

Also, share two examples of in_array associative array PHP and multidimensional. So, you can see the code in the below section.

Although, apply this example for index array and created a $arr variable defined array.

Also, inserted some string values then apply if condition to check array value exists or not in the array. As well As mention output condition.

in_array Associative Array PHP

Similarly, In this example, and in array function only searches values that exist then condition true and false.

So you can see below example have applied for associative array and check value exists with the using in_array().

 'php','lang2' => 'java','lang3' => 'python'); if ( in_array( 'java', $arr ) ) < echo 'exists'; >else

in_array() Multidimensional

In this example, we applied for multidimensional arrays. Here, in this array, only one concept to searches value from the array.

Firstly, check the value that which array available value have mention array to array path by array values. and then find as this example display code.

 'php', 'lang2' => 'java', 'lang3' => array( 'red','green','blue' ) ); if ( in_array( 'green', $arr['lang3'] ) ) < echo 'exists'; >else

Hence, Keep scrolling down to the next example.

How to Push Associative Array in PHP

Usually, we give a basic example that how to push associative array in PHP, First, I have pushed a single key and value inside the associative array. After that, given some more examples like it multiple arrays pushing with the using PHP function.

$arr = array( "name" => "Jonny", "Mob" => "12345", "Email" => "jonny123@gmail.com" ); $arr['Address'] = array( "state" => "delhi", "country" => "India", "pincode" => "123854" ); echo "
"; print_r($arr);
 
 Jonny [Mob] => 12345 [Email] => jonny123@gmail.com [Address] => Array ( [state] => delhi [country] => India [pincode] => 123854 ) )
 
So, this is the best simple example to add and push any type of array in your codes. Now, show you another example with the single key and value. check out the below section.
 
Array Push Multidimensional PHP
 
Hence, you can see until the concept to push of multidimensional array. Here, only created an array variable. Also, add on value in the same variable with the push other array key and value see this below.
 
 "jonh", "Mob" => "588555", "Email" => "jonh143@gmail.com" ); $arr['Country'] = "United State"; 
 
array_push() function PHP Example
 
Here, provide a PHP function for the index array. Now, see how to insert a value inside the array with array_push() see below.
 
$arr = array('one', 'two', 'three'); array_push($arr, 'four');
 
Output :- Array ( [0] => one [1] => two [2] => three [3] => four )
 
Hence, Keep scrolling down to the next example.
 
is_array() | is Array PHP function With Example
 
Now, we give the best example of is array PHP and how to check an array is empty are not. As well as define what is_array() or how to use is_array() in PHP.
 
Output:- Available
 
Here, Also given another example of is_array(). So, in this example passing string in a variable that must pass is array function. It means out will be of else condition check it below code.
 
is Array PHP function Example - is_array()
 
Now output:- Not Available
 
Therefore, you can see this type out if you put this function is_array( $arr ). It means only give only boolean as true and false. Secondly, put this code anywhere with the condition and check that is an array or not. Also, Check this example empty()
 
Hence, Keep scrolling down to the next example.
 
empty() | Check if an Array is Empty or Not in PHP
 
The simplest way to use Check if an Array is Empty or Not in PHP example looks like this.
 
 34, 'data2' => 36 ); if(empty( $arr ))< echo 'empty array'; >else < echo 'Not Empty Array'; >?>
 
Here, in this code define PHP check array with the using empty() function example and apply along with the condition. Also, implement this method on your source code of functionality. According, have to how another example in the below section with empty() function.
 
How to check if an array is empty - empty()
 
$arrdata = array( 'red', 'black', 'white' ); if(!empty( $arrdata ))< echo 'Not empty data'; >else
 
Now, display this example for using !empty() function. Firstly, Store an array of variables this is an index array then apply conditions to check array values are empty. The best example must apply anywhere on the page.
 
Hence, Keep scrolling down for the next chapter.
 
strrev() | PHP Reverse String | Example
 
The simplest PHP Reverse String example looks like this.
 
Outputs - trams nrael bew 
 
strrev() - How to Reverse a String
 
In this chapter, I added an example for the PHP reverse string. So, you can apply this example and reverse each word character as well as possibly change a string.
 
Hence, Keep scrolling down for the next chapter.
 
strlen() | String Length PHP | Example
 
The simplest string length PHP example looks like this.
 
Outputs - 23 
 
strlen() - Count length of string in PHP
 
In this chapter, you can see PHP strlen function. accordingly, get the length of the string with this example. Also, you can apply conditions with the use of common syntax. Also read about more information Submit Form without Page Refresh using Ajax jQuery PHP
 
Keep scrolling down for the next chapter.
 
str_word_count() | Word limit in PHP | Example
 
The simplest way word limit in PHP example looks like this.
 
str_word_count() - Word count in PHP
 
In this chapter, you can see examples of a number of words in this string. Also, implement with the condition. Accordingly, you must apply and try this condition on your project for the string in PHP. How to Insert JSON data into MySQL using PHP
 
Hence, Keep scrolling down for the next chapter.
 
Источник
 
in_array
 
Searches for needle in haystack using loose comparison unless strict is set.
 
Parameters
 
 
Note: 
 
If needle is a string, the comparison is done in a case-sensitive manner.
 
 
If the third parameter strict is set to true then the in_array() function will also check the types of the needle in the haystack .
 
 
Note: 
 
Prior to PHP 8.0.0, a string needle will match an array value of 0 in non-strict mode, and vice versa. That may lead to undesireable results. Similar edge cases exist for other types, as well. If not absolutely certain of the types of values involved, always use the strict flag to avoid unexpected behavior.
 
 
Return Values
 
Returns true if needle is found in the array, false otherwise.
 
Examples
 
Example #1 in_array() example
 
$os = array( "Mac" , "NT" , "Irix" , "Linux" );
if ( in_array ( "Irix" , $os )) echo "Got Irix" ;
>
if ( in_array ( "mac" , $os )) echo "Got mac" ;
> 
?> 
The second condition fails because in_array() is case-sensitive, so the program above will display:
 
Example #2 in_array() with strict example
 
if ( in_array ( '12.4' , $a , true )) echo "'12.4' found with strict check\n" ;
>
 
if ( in_array ( 1.13 , $a , true )) echo "1.13 found with strict check\n" ;
> 
?>
 
The above example will output:
 
1.13 found with strict check
 
Example #3 in_array() with an array as needle
 
if ( in_array (array( 'p' , 'h' ), $a )) echo "'ph' was found\n" ;
>
 
if ( in_array (array( 'f' , 'i' ), $a )) echo "'fi' was found\n" ;
>
 
if ( in_array ( 'o' , $a )) echo "'o' was found\n" ;
> 
?>
 
The above example will output:
 
See Also
 
 
array_search() - Searches the array for a given value and returns the first corresponding key if successful
 
isset() - Determine if a variable is declared and is different than null
 
array_key_exists() - Checks if the given key or index exists in the array
 
 
User Contributed Notes 8 notes
 
Loose checking returns some crazy, counter-intuitive results when used with certain arrays. It is completely correct behaviour, due to PHP's leniency on variable types, but in "real-life" is almost useless.
 
The solution is to use the strict checking option.
 
$array = array( 
'egg' => true , 
'cheese' => false , 
'hair' => 765 , 
'goblins' => null , 
'ogres' => 'no ogres allowed in this array' 
);
 
// Loose checking -- return values are in comments
 
// First three make sense, last four do not
 
in_array ( null , $array ); // true 
in_array ( false , $array ); // true 
in_array ( 765 , $array ); // true 
in_array ( 763 , $array ); // true 
in_array ( 'egg' , $array ); // true 
in_array ( 'hhh' , $array ); // true 
in_array (array(), $array ); // true
 
in_array ( null , $array , true ); // true 
in_array ( false , $array , true ); // true 
in_array ( 765 , $array , true ); // true 
in_array ( 763 , $array , true ); // false 
in_array ( 'egg' , $array , true ); // false 
in_array ( 'hhh' , $array , true ); // false 
in_array (array(), $array , true ); // false
 
I got an unexpected behavior working with in_array. I'm using following code:
 
 // . 
$someId = getSomeId (); // it gets generated/fetched by another service, so I don't know what value it will have. P.S.: it's an integer
 
// The actual data in my edge-case scenario:
// $someId = 0;
// $anyArray = ['dataOne', 'dataTwo']; 
if ( in_array ( $someId , $anyArray )) // do some work 
> 
// . 
?> 
 
With PHP7.4, in_array returns boolean true.
With PHP8.1, in_array returns boolean false.
 
It took me quite some time to find out what's going on.
 
I found out that in_array will *not* find an associative array within a haystack of associative arrays in strict mode if the keys were not generated in the *same order*:
 
$needle = array( 
'fruit' => 'banana' , 'vegetable' => 'carrot' 
);
 
$haystack = array( 
array( 'vegetable' => 'carrot' , 'fruit' => 'banana' ), 
array( 'fruit' => 'apple' , 'vegetable' => 'celery' ) 
);
 
echo in_array ( $needle , $haystack , true ) ? 'true' : 'false' ; 
// Output is 'false'
 
echo in_array ( $needle , $haystack ) ? 'true' : 'false' ; 
// Output is 'true'
 
?> 
 
I had wrongly assumed the order of the items in an associative array were irrelevant, regardless of whether 'strict' is TRUE or FALSE: The order is irrelevant *only* if not in strict mode.
 
I'd like to point out that, if you're using Enum data structures and want to compare whether an array of strings has a certain string Enum in it, you need to cast it to a string.
 
From what I've tested, the function works correctly:
if the array is filled with strings and you're searching for a string;
if the array is filled with Enums and you're searching for an Enum.
 
Here is a recursive in_array function:
 
$myNumbers = [ 
[ 1 , 2 , 3 , 4 , 5 ], 
[ 6 , 7 , 8 , 9 , 10 ],
];
 
$array = [ 
'numbers' => $myNumbers 
];
 
// Let's try to find number 7 within $array 
$hasNumber = in_array ( 7 , $array , true ); // bool(false) 
$hasNumber = in_array_recursive ( 7 , $array , true ); // bool(true)
 
function in_array_recursive ( mixed $needle , array $haystack , bool $strict ): bool 
 foreach ( $haystack as $element ) if ( $element === $needle ) return true ; 
>
 
$isFound = false ; 
if ( is_array ( $element )) $isFound = in_array_recursive ( $needle , $element , $strict ); 
>
 
if ( $isFound === true ) return true ; 
> 
>
 
If you're creating an array yourself and then using in_array to search it, consider setting the keys of the array and using isset instead since it's much faster.
 
$slow = array( 'apple' , 'banana' , 'orange' );
 
if ( in_array ( 'banana' , $slow )) 
print( 'Found it!' );
 
$fast = array( 'apple' => 'apple' , 'banana' => 'banana' , 'orange' => 'orange' );
 
if (isset( $fast [ 'banana' ])) 
print( 'Found it!' );
 
Источник