1、if条件语句

If(expr)

echo TRUE

else

echo FALSE

if(expr){

echo TRUE

}else{

echo FALSE

}

if(expr){

echo TRUE

}

elseif(expr){

echo CON

}else{

echo FALSE

}

1、switch条件语句

switch($i){

case 0:

echo “输出0”;

break;

case 1:

echo “输出1”;

break;

case 2:

echo “输出2”;

break;

default: echo “sssssss”;

}