html - Can someone explain this sample PHP code for me? -
i doing independent study on php , html in w3school , don't understand following codes: (copied w3school)
1 <!doctype html> 2 <html> 3 <body> 4 5 <form method="post" action="<?php echo $_server['php_self'];?>"> 6 name: <input type="text" name="fname"> 7 <input type="submit"> 8 </form> 9 10 <?php 11 if ($_server["request_method"] == "post") { 12 // collect value of input field 13 $name = $_post['fname']; 14 if (empty($name)) { 15 echo "name empty"; 16 } else { 17 echo $name; 18 } 19 } 20 ?> 21 22 </body> 23 </html> q1: why can i, , how should insert php code in middle of bunch of html codes sample did in line 5? topic should @ learn more kind of operation?
q2: in php codes after line 10, why want include if statement decide if request method "post"? can't go other if condition, in 1 check text box empty?
appreciate help(:
answer of question 1:
- you can add php code anywhere in html document. have use
<?phpstart ,?>end.
answer of question 2:
you have include if statement decide request post because have given post method in form. can learn more form , attributes here
you have write php code in page because have mentioned
$_server['php_self']in action attribute means form data sent this(self) page through post method. -you can learn method here
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