Example explanation of PHP string principles_PHP tutorial

When using , in fact, the PHP string principle is a character array. Suppose we define a string

1. < ?
2. $string ="hello world";
3. /*
4. This string is composed of h , e , l , l , o , space
   , w ,o,r ,l,d are composed of these characters. As for what ends with
   , I can understand it now. You may need to check the original PHP code to find out
5. */
6. //What is the basis for what I said above? The following can be tested
7. echo $string[2];
   //The third character l is displayed, we can try to change
8. $string[2]="A";
   //Change one of the characters;
9. echo $string;
   // Get heAlo world
10. //Then we can try to change $string[2] to string
11. $string[2]="AAAAAA";
    / /Test to see if PHP will overwrite the characters behind it
12. echo $string;
    // Get heAlo world, haha ​​It seems that PHP has done safety processing
13. ?>

How about, through the above code examples, can you clearly understand the PHP string principle? Everyone can slowly experience it in actual operations in the future.

http://www.bkjia.com/PHPjc/446264.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/446264.htmlTechArticleIn fact, when using PHP string principle, it is a character array. Suppose we define a string? $ string = helloworld; /* This string is composed of the characters h, e, l, l, o, space, w, o, r, l, d...