What does .= in php mean?

".=" in php represents the assignment operator, which means string concatenation. The usage syntax of this operator is such as "$string .= string2;", which can achieve the string splicing effect.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

php.=What does it mean?

The meaning of .= in PHP:

.= The meaning of string concatenation in PHP

For example:

　　$a = 'a';
　　$a .= 'bc';
　　$a = 'abc';

Similar = -= *= /=

That is to say

$a = 'a'.'bc'

When the value of variable $a is a

Execute $a .= 'bc'

The result is $a = 'abc'

When the value of variable $a is x

Execution$a .= 'bc'

The result is$a = 'xbc'

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