Points of doubt to solve the idea

The doubt of the point number

PHP Code

  
  Echo ' 1+5= '. 1;  Why this write will be error echo ' 1+5= '. 1; This sentence can execute echo ' 1+5= '. (1);//Get a brace outside

------Solution--------------------
When adjacent to a number, it is recognized as a decimal
and less than 1 decimal can omit the start of 0, such as 0.1 written. 1 is legal.

So ' 1+5 '. 1 is parsed into two contiguous constants, and there are no operators between them, which will naturally result in an error.

Similarly, 1. " ABC "will also error
------Solution--------------------
When it is adjacent to a number, it is recognized as a decimal, as the second floor says.
Echo ' 1+5= '. 1; This sentence can be executed: in PHP is the meaning of the connector, is the meaning of string connection.

------Solution--------------------
As Hengyu654 said, "." Direct numbers are not treated as string literals and are treated as decimal points
As follows:

PHP Code

echo "THR". " EE ";           Output string "Three" echo "TWE". "Lve";        Output string "Twelve" Echo 1. 2;                Output string "1.2" echo;                  Output digital 1.2echo 1.. 2;                
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