str_split() : splits a string into an array of smaller chunks

$string="Welcome to Plus2net Php section";
print_r(str_split($string,5));

Array ( [0] => Welco [1] => me to [2] => Plus [3] => 2net [4] => Php s [5] => ectio [6] => n ) 

str_split(string, integer of length )

$string="Welcome to Plus2net Php section";
print_r(str_split($string));

Array ( [0] => W [1] => e [2] => l [3] => c [4] => o [5] => m [6] => e [7] => [8] => t
 [9] => o [10] => [11] => P [12] => l [13] => u [14] => s [15] => 2 [16] => n [17] => e 
[18] => t [19] => [20] => P [21] => h [22] => p [23] => [24] => s [25] => e [26] => c 
[27] => t [28] => i [29] => o [30] => n ) 

Example 2: Splitting Strings with Non-English Characters

The *str_split()* function can handle non-English characters, but care is needed with multibyte strings (e.g., UTF-8). For such cases, *mb_str_split()* is recommended:

$string = "Добро пожаловать";
print_r(mb_str_split($string, 4)); 
// Outputs: Array ( [0] => Добр [1] => о по [2] => жал [3] => оват )

Example 3: Splitting Strings into a Custom Length

Here's an example that splits the string into custom-length substrings:

$string = "123456789";
print_r(str_split($string, 3)); 
// Outputs: Array ( [0] => 123 [1] => 456 [2] => 789 )

Use Case: Chunking Strings for Data Formatting

You can use *str_split()* to format long strings, such as splitting a string into smaller segments for display:

$long_string = "ThisIsAVeryLongStringWithoutSpaces";
$chunks = str_split($long_string, 5);
foreach ($chunks as $chunk) {
    echo $chunk . "<br>";
}
// Outputs the string in 5-character chunks

ThisI
sAVer
yLong
Strin
gWith
outSp
aces

Example 4: Handling Empty Strings

If you pass an empty string to str_split(), the function returns an empty array:

$empty_string = "";
print_r(str_split($empty_string)); 
// Outputs: Array ( )

Example 5: Combining str_split() with implode() for Reformatting

You can combine str_split() with implode() to reformat strings by adding separators between chunks:

$card_number = "1234567812345678";
$formatted = implode("-", str_split($card_number, 4));
echo $formatted; 
// Outputs: 1234-5678-1234-5678