Formulier - meerdere buttons

<?php 
if( isset($_POST['eerste_submit']) ) {
  // doe dit
}

if( isset($_POST['tweede_submit']) ) {
  //doe dit
}
?>

<?php 
if( isset($_POST['eerste_submit']) ) {
  // doe dit
}
 
if( isset($_POST['tweede_submit']) ) {
  //doe dit
}
?>

<input type="submit" name="eerste_submit" value="Eerste submit">
<br />
<input type="submit" name="tweede_submit" value="Tweede submit">

<input type="submit" name="eerste_submit" value="Eerste submit">
<br />
<input type="submit" name="tweede_submit" value="Tweede submit">

<?php
$aantal = 50;
for($i = 0; $i <= $aantal; $i++) {
  echo '<input type="submit" name="submit_' . $i . '" value="' . $i . '">';
}
?>

<?php
$aantal = 50;
for($i = 0; $i <= $aantal; $i++) {
  echo '<input type="submit" name="submit_' . $i . '" value="' . $i . '">';
}
?>

<form>
<?php
$aantal = 50; //aantal submits

for( $i = 0; $i < $aantal; $i++ ) {

?>
     <input type="submit" name="submit[<?= $i ?>]" value="klik <?= $i ?>" /><br />

<?php

}

?>

<form>
<?php
$aantal = 50; //aantal submits
 
for( $i = 0; $i < $aantal; $i++ ) {
 
?>
     <input type="submit" name="submit[<?= $i ?>]" value="klik <?= $i ?>" /><br />
 
<?php
 
}
 
?>

<?php

for( $i=0; $i<$aantal; $i++ ) {

  if( isSet( $_POST['submit[$i]'] ) ) {

     $button_die_geklikt_is = $i;
 
  }

}

echo "er is op de ". $button_die_geklikt_is ." button geklikt";

?>

<?php
 
for( $i=0; $i<$aantal; $i++ ) {
 
  if( isSet( $_POST['submit[$i]'] ) ) {
 
     $button_die_geklikt_is = $i;
 
  }
 
}
 
echo "er is op de ". $button_die_geklikt_is ." button geklikt";
 
?>