PHP_Class Summary Notes 0614

Sequential control statements (branch control (if; switch); loop control (for; while)); break; continue; goto; variables; constants; functions

if branch control (branch is in several ranges time)

Single branch: if(..){..};

Double branch: if(..){..}else{..}

Multiple branches: if(. .){..}else if(..){..}else if(..){..}

switch branch statement (when the branch is several points)

switch(expression ){

case constant1:

//nmulti-statement;

break;

case constant2:

//nMultiple statements

break;

defual:

//nMultiple statements;

break;

}

for loop control

for(initial value of loop ;conditions for looping ;step size){

//nMultiple statements;

}

while loop statement

while(loop condition){

//Loop body,statement

}

break

break defaults to jumping out of 1 layer, followed by the number n, break n can specify n layers to jump out of, but n cannot exceed the actual jump out The number of loop levels, otherwise a fatal error will be reported

continue

conitnue is used to end the remaining code of this loop and start a new loop from scratch (if the condition is true, continue execution), continue can also be followed by a number , indicating the number of cycles to restart from

goto

Through the goto statement, we can jump the program to the specified place for execution

goto tag;

Quick Start Case 2

for($i =0,$j=50; $i<100; $i++) {

while($j--) {

if($j==17) goto end;

}

}

echo " i = $i";

end:

echo 'j = 17 '.$i."||".$j;

result:

j = 17

The above has introduced PHP_Class Summary Notes 0614, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.