Understanding PHP String Principles_PHP Tutorial

Many times we use PHP strings, and how PHP strings are composed, it is estimated that few people understand this~

In fact, PHP string is a character array. Suppose we define a string

$string ="hello world";

/*

This string is composed of h, e, l, l, o, space, w, o, r, l, d. As for what it ends with, I can understand it now. You may need to check the PHP original Code can be discovered

*/

//What is the basis for what I said above? You can test it below

echo $string[2];//The third character l is displayed, we can try to change

$string[2]="A";//Change one of the characters;

echo $string;// get heAlo world

//Then we can try to change $string[2] to string

$string[2]="AAAAAA";//Test to see if PHP will overwrite the following characters

echo $string;// Get heAlo world , haha. It seems that PHP has done safety processing

?>

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