array_diff_assoc(): Difference between two arrays considering keys

$first = ['a' => 'red', 'b' => 'green'];
$second = ['a' => 'red', 'b' => 'blue'];
$result = array_diff_assoc($first, $second);
print_r($result);

$new_array = array_diff_assoc ($array1, $array2,....);

Example with two arrays

$first=array('One' =>'First','Two'=>'Second','Three'=>'Third','Four'=>'Fourth');
$second=array('One'=> 'First','Two'=>'2nd','Third'=>'3rd','Fourth'=>'Fourth');

// What is not common in both arrays ( keys also considered ) ///
$result1=array_diff_assoc($first,$second);
foreach ($result1 as $key => $val) {
echo "$key -> $val <br>";
}

Two -> Second 
Three -> Third 
Four -> Fourth 

Difference between array_diff() and array_diff_assoc()

$first=array('One' =>'First','Two'=>'Second','Three'=>'Third','Four'=>'Fourth');
$second=array('One'=> 'First','Two'=>'2nd','Third'=>'3rd','Fourth'=>'Fourth');

// What is not common in both arrays ( keys also considered ) ///
echo "<br>----array_diff_assoc()---<br>";
$result1=array_diff_assoc($first,$second);
foreach ($result1 as $key => $val) {
echo "$key -> $val <br>";
}

// What is not common in both arrays ( without considering Keys ) ///
echo "<br>----array_diff()---<br><br>";
$result2=array_diff($first,$second);
foreach ($result2 as $key => $val) {
echo "$key -> $val <br>";
}

----array_diff_assoc()---
Two -> Second 
Three -> Third 
Four -> Fourth 

----array_diff()---

Two -> Second 
Three -> Third 

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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