PHP/Statement/break statement
Содержание
Break 1 or break 2
<source lang="html4strict">
<? $arr = array( "one", "two", "three", "four", "stop", "five" ); while ( list( , $val ) = each( $arr ) ) {
if ( $val == "stop" ) {
break; /* You could also write "break 1;" here. */
}
echo "$val
\n";
} $i = 0; while ( ++$i ) {
switch ( $i ) {
case 5:
echo "At 5
\n";
break 1; /* Exit only the switch. */
case 10:
echo "At 10; quitting
\n";
break 2; /* Exit the switch and the while. */
default:
break;
}
} ?>
</source>
Breaking a Loop
<source lang="html4strict">
<?php
for ($a = 1; $a <= 20; $a++){
$divide = 40/$a;
echo "The result of dividing 40 by $a is $divide", "
";
}
?>
</source>
Break Statement
<source lang="html4strict">
<html>
<head>
<title>Break Statement</title>
</head>
<body>
<?php
$i = 0;
while ( $i < 6 )
{
if( $i == 3) break;
$i++;
}
echo("Loop stopped at $i by break statement");
?>
</body>
</html>
</source>
break within a for loop
<source lang="html4strict">
<?php
$primes = array(2,3,5,7,11,13);
for($count = 1; $count++; $count < 1000) {
$randomNumber = rand(1,50);
if (in_array($randomNumber,$primes)) {
break;
} else {
echo "Non-prime number encountered: $randomNumber
";} }
?>
</source>
The break command applies to both loops and switch/case statements
<source lang="html4strict">
for ($i = 1; $i < 3; $i = $i + 1) {
for ($j = 1; $j < 3; $j = $j + 1) {
for ($k = 1; $k < 3; $k = $k + 1) {
switch($k) {
case 1:
print "I: $i, J: $j, K: $k\n";
break 2;
case 2:
print "I: $i, J: $j, K: $k\n";
break 3;
}
}
}
}
</source>
Using break to avoid division by zero
<source lang="html4strict">
<?php $counter = -3; for (; $counter < 10; $counter++){
if ($counter == 0){
echo "Stopping to avoid division by zero.";
break;
}
echo "100/$counter
";
} ?>
</source>
Using the break Statement
<source lang="html4strict">
<html> <head><title>Using the break Statement</title></head> <body>
<?php
$counter = -4;
for ( ; $counter <= 10; $counter++ ) {
if ( $counter == 0 ) {
break;
}
$temp = 4000/$counter;
print "4000 divided by $counter is.. $temp
";
}
?>
</body> </html>
</source>
