PHP for loops and foreach loops

For loops in PHP

<? PHP $arr Array ("A", "B", "C");  for $i $i Count ($arr$i+ +)    {echo$arr[$i];}; // count equals the length?> in JS

optimization

<? PHP $arr Array ("A", "B", "C", ' d '); $num Count ($arr);  for $i $i $num $i+ +)    {echo$arr[$i]. ' <br> ';}; // count equals the length?> in JS

In PHP, the For loop is not commonly used, and the most commonly used is the Foreach Loop

foreach Loop

<? PHP     $arr Array ("A", "B", "C", ' d ', ' e ');     foreach ($arras$value) {        echo "{$value}<br>"  ;        };? >

The power of foreach is that it can output subscript

<? PHP     $arr Array ("A", "B", "C", ' d ', ' one ' = ' e ');     foreach ($arras$key$value) {        echo ' {$key}--- {$value}<br> ";        };? >

See an example of an array turning into a table

<?PHP$group= [        [' Name ' = ' Zs ', ' age ' = ', ' sex ' = ' male ', ' email ' = ' [email protected] ',        [' Name ' = ' as ', ' age ' = ', ' sex ' = ' female ', ' email ' = ' [email protected] ',        [' Name ' = ' Zs ', ' age ' = ', ' sex ' = ' male ', ' email ' = ' [email protected] ',        [' Name ' = ' as ', ' age ' = ', ' sex ' = ' female ', ' email ' = ' [email protected] ',        [' Name ' = ' Zs ', ' age ' = ', ' sex ' = ' male ', ' email ' = ' [email protected] ',        [' Name ' = ' as ', ' age ' = ', ' sex ' = ' female ', ' email ' = ' [email protected] ',        [' Name ' = ' Zs ', ' age ' = ', ' sex ' = ' male ', ' email ' = ' [email protected] ',        [' Name ' = ' as ', ' age ' = ', ' sex ' = ' female ', ' email ' = ' [email protected] ']    ]; Echo' <table border= ' 1 "width=" align= "Center" > "; Echo' <caption>; //foreach Loop    foreach($group  as $row){        Echo' <tr> '; foreach($row  as $col){            Echo' <td> '.$col.‘ </td> ';        }; Echo' </tr> '; };?>

php for loops and foreach loops