php += .= what does it mean?

The = symbol in php is equivalent to the plus operator, which means adding two variables. The syntax is "x = y" or "x = x y"; the .= symbol in php means connecting two strings. The syntax is "a .= b" or "a = a . b".

#The operating environment of this article: Windows7 system, PHP7.1, Dell G3 computer.

php = .= What does it mean?

Look at the formula:

• x = y is equivalent to x = x y , which means addition;

• a .= b is equivalent to a = a . b , which means concatenating two strings.

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