Explain relevant examples of PHP array traversal

Traverse the array: It means going through each one once. This article will explain the relevant examples.

1) for loop

is rarely used because it has defects

'傻逼',
        'num'=>10
);
/*
foreach($arr1 as $value){
    echo $value.'
';
}
*/
foreach($arr1 as $key=>$value){
    echo $key.'=>'.$value.'
';
}
?>

';
    }
}
?>
';
foreach ($students as $val){
    if($val[2]===true){
        $val[2]='男';
    }else{
        $val[2]='女';
    }
    echo "{$val[0]}{$val[1]}{$val[2]}{$val[3]}";
}
echo '';
?>

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