PHP If judgment shorthand

First type: IF condition statement

The second type: three mesh operation

The third kind of:&&, | | Conditional statements made up of

The first kind: IF do not say, this is the foundation, I believe most people will;

The second kind: C=a>b? True:false//means: If the a>b is true then return true, otherwise return false (of course, can be replaced with a statement), and return the result to C;

The third type:

1. &&

In most languages, he means and meaning, that is, the left and right sides are true, using PHP as an example, traditionally used;

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1. if ($a >0 && $b >0) {
2. //statement;
3. }

Execute the statement when both are true;

Today, however, we use him as a conditional statement, for example there is a traditional conditional statement at the bottom:

if ($a >0) {

$b = ' This is test ';

}

The statement is executed when the condition is true, but it is too cumbersome to write, so we can write it directly:

$a >0 && ($b = ' This is test ');

The computer will first determine whether a $ A is true, if it is, then execute the following statement, if no, the subsequent statement will not be necessary to execute;

Benefits: 1, can be written in one line,

2, omit the code;

2, | |

Unexpectedly && can write conditional statements like this, then | | Of course, it is possible, but his order of execution is not the same.

$a >0 | | ($b = ' This is test ');

The computer first determines whether a $ A >0 is true, is: The following statement will not execute, no: execute;

PHP If judgment shorthand