php - If first $_GET field is empty but second has a value, echo to fill in missing value -

i want "please fill in form below:" @ first, before input, afterwards if input age no name, want say: "please enter name:" , if input name no age then: "please enter age:" if submit nothing then: "error: please enter name , age continue"

here code have:

   if( $_get["name"] && $_get["age"] ) {   echo "<p>welcome ". $_get['name']. " ... ";   echo "you ". $_get['age']. " years old.</p>";    exit();    } elseif ( $_get["name"] == false ) {        echo "<p>please fill in form below:</p>";    } elseif ( $_get["age"] == false ) {        echo "<p>please fill in form below:</p>";    } elseif ( $_get["name"] == false && $_get["age"] ) {        echo "<p>please fill in name:</p>";    } elseif ( $_get["age"] == false && $_get["name"] ) {        echo "<p>please fill in age:</p>";    } 

i'm learning php , i've tried can think of, i've ended far!

thank you.

replace false empty() , you're there

your form:

<form method='post' ... >  <input type='text' name='name' value=''> ... </form> 

then php:

  if( $_post["name"] ... ) {   ...   exit; }  elseif ( empty($_post["name"]) ) {        echo "<p>please fill in form below:</p>";    } elseif ( empty($_post['age'] || !is_numeric($_post["age"]) ) {        echo "<p>please fill in form below:</p>";    } elseif ( empty($_post['name'] && !empty($_post['age'] ) {        echo "<p>please fill in name:</p>";    } elseif (  !empty($_post['name'] && empty($_post['age']) {        echo "<p>please fill in age:</p>";    } 

you should restructure logic 2 values independent

• check if name filled in.
• check if age filled in.
• return echo statement user.

so above series of elseif statements can become...

if(empty($_post['name'])){     $notice .= " please enter name."; } if(empty($_post['age'])){     $notice .= " please enter age."  } print $notice.  

the .= concatenates new definition on end of current (or empty) value of variable. can print $notice every time because either empty (nothing printed) or has value, want print, it's win win every time.