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foreach function in php_PHP tutorial

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Release： 2016-07-14 10:12:11
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Foreach function (PHP4/PHP5)

The foreach syntax structure provides a simple way to traverse an array.
foreach can only be applied to arrays and objects. If you try to apply it to variables of other data types, or uninitialized variables, an error message will be issued.
has two syntaxes:
[php]
foreach (array_expression as $value)
statement
foreach (array_expression as $key => $value)
statement
foreach (array_expression as $value)
statement
foreach (array_expression as $key => $value)
statement
Example 1:
[php]
$arr=array(1,2,3,4);
foreach($arr as $value){
echo $value."
";
}
?>
$arr=array(1,2,3,4);
foreach($arr as $value){
echo $value."
";
}
?>
Example 2:
[php]
$arr=array(1,2,3,4);
foreach($arr as $key=>$value){
echo $key."=====>".$value."
";
}
?>
$arr=array(1,2,3,4);
foreach($arr as $key=>$value){
echo $key."=====>".$value."
";
}
?>

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/477218.htmlTechArticleForeach function (PHP4/PHP5) The foreach syntax structure provides a simple way to traverse an array. foreach can only be applied to arrays and objects. If you try to apply it to variables of other data types,...
Related labels：
foreach php php5 function supply Grammatical structures Traverse
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