Hướng dẫn what does concatenate mean in php? - nối có nghĩa là gì trong php?

Có hai toán tử chuỗi. Đầu tiên là toán tử nối ('.'), Trả về sự kết hợp của các đối số bên phải và trái của nó. Thứ hai là toán tử gán kết hợp ('.='), điều này nối liền đối số ở phía bên phải vào đối số ở phía bên trái. Vui lòng đọc các nhà khai thác chuyển nhượng để biết thêm thông tin.string operators. The first is the concatenation operator ('.'), which returns the concatenation of its right and left arguments. The second is the concatenating assignment operator ('.='), which appends the argument on the right side to the argument on the left side. Please read Assignment Operators for more information.

$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"$a = "Hello ";
$a .= "World!";     // now $a contains "Hello World!"
?>

K.alex ¶ ¶

9 năm trước

As for me, curly braces serve good substitution for concatenation, and they are quicker to type and code looks cleaner. Remember to use double quotes (" ") as their content is parced by php, because in single quotes (' ') you'll get litaral name of variable provided:

$a

Anders Dot Benke tại Telia Dot Com ¶ ¶

18 năm trước

A word of caution - the dot operator has the same precedence as + and -, which can yield unexpected results.

Example:

$var = 3;

echo "Result: " . $var + 3;
?>

$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"$a = "Hello ";
$a .= "World!";     // now $a contains "Hello World!"
?> 0

$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"$a = "Hello ";
$a .= "World!";     // now $a contains "Hello World!"
?> 1

$var = 3;

$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"$a = "Hello ";
$a .= "World!";     // now $a contains "Hello World!"
?> 3

Stephen Clay ¶ ¶

16 năm trước

$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"$a = "Hello ";
$a .= "World!";     // now $a contains "Hello World!"
?> 5

hexidecimalgadget tại hotmail dot com ¶ ¶

13 năm trước

$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"$a = "Hello ";
$a .= "World!";     // now $a contains "Hello World!"
?> 6

$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"$a = "Hello ";
$a .= "World!";     // now $a contains "Hello World!"
?> 7

Mariusads :: at :: helpia.com ¶

14 năm trước

$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"$a = "Hello ";
$a .= "World!";     // now $a contains "Hello World!"
?> 9

As for me, curly braces serve good substitution for concatenation, and they are quicker to type and code looks cleaner. Remember to use double quotes (" ") as their content is parced by php, because in single quotes (' ') you'll get litaral name of variable provided:0

As for me, curly braces serve good substitution for concatenation, and they are quicker to type and code looks cleaner. Remember to use double quotes (" ") as their content is parced by php, because in single quotes (' ') you'll get litaral name of variable provided:1

As for me, curly braces serve good substitution for concatenation, and they are quicker to type and code looks cleaner. Remember to use double quotes (" ") as their content is parced by php, because in single quotes (' ') you'll get litaral name of variable provided:2

Biziclop ¶ ¶

2 tháng trước đây

As for me, curly braces serve good substitution for concatenation, and they are quicker to type and code looks cleaner. Remember to use double quotes (" ") as their content is parced by php, because in single quotes (' ') you'll get litaral name of variable provided:4

As for me, curly braces serve good substitution for concatenation, and they are quicker to type and code looks cleaner. Remember to use double quotes (" ") as their content is parced by php, because in single quotes (' ') you'll get litaral name of variable provided:5

As for me, curly braces serve good substitution for concatenation, and they are quicker to type and code looks cleaner. Remember to use double quotes (" ") as their content is parced by php, because in single quotes (' ') you'll get litaral name of variable provided:6