Use if inside foreach

I just responded to illustrate what's going on. What happens in your code is that you have created a condition that can be read like this:

There they all appear. Try this code with the same problem but with a "hint" inside if to understand what happened:

$numeros = array(1, 2, 3, 4, 5, 6, 7, 8, 9);
echo '<ul>';
foreach($numeros as $numero){
    if($numero > 5){
        echo '<li>MAIOR QUE CINCO - '.$numero.'</li>';
    }else{
        echo '<li>MENOR OU IGUAL - '.$numero.'</li>';
    }
}
echo '</ul>';

A simplistic solution would be to separate the loops (even though in a practical case we would probably have much better solutions):

$numeros = array(1, 2, 3, 4, 5, 6, 7, 8, 9);
echo '<ul>';
foreach($numeros as $numero){
    if($numero > 5){
        echo '<li>'.$numero.'</li>';
    }
}
foreach($numeros as $numero){
    if($numero <= 5) {
        echo '<li>'.$numero.'</li>';
    }
}
echo '</ul>';

We look like this:

  

This is a didactic response. In the practical case, several optimizations could be made depending on the use of the data.

You can also treat arrays before printing, as follows:

$numeros = array(1, 2, 3, 4, 5, 6, 7, 8, 9);
asort($numeros); // necessário se o array estiver desordenado
$num = 5; // valor limite
$pos = array_search($num,$numeros); // pega a posição do array conforme valor determinado
$numerosMenores = array_slice($numeros,0,$pos); // pega parte do array com os numeros menores
$numerosMaiores = array_slice($numeros,$pos); // pega parte do array com os numeros maiores
$numeros = array_merge($numerosMaiores, $numerosMenores); //funde os arrays

foreach($numeros as $numero){
    echo '<li>'.$numero.'</li>';
}
echo '</ul>';

OBS: If your array is out of order you will first need to sort it, asort($numero) , or this will not work.

Although with PHP you can do many things in many different ways this does not mean that you will hammer a screw just because you did not find the right one.

With this in mind, consider what you want to do: "A condition within an iteration". What will this condition do? "It will filter a certain result before running the routine on it."

So, use the right or most appropriate tool for the task in question: array_filter ()

This function will receive a given input array and filter it according to the function passed as the second argument. This function can be a string for some function known to the program (such as a native function, for example), an anonymous function, or even an object method.

$data = array( 1,2,3,4,5,6,7,8,9,10 );

$data = array_filter(

    $data,

    function( $current ) {

        return ( $current <= 5 );
    }
);

$ data , now has only five elements, one to five.

"But I have to print everything"

Here is where the various possibilities come in. One cool thing would be to compute the difference of the input array for this filtering, with array_diff ()

"But I still have to iterate to print"

Only if you want. Because a one-dimensional array can be perfectly printed with implode() , with HTML and everything:

$data = array( 1,2,3,4,5,6,7,8,9,10 );

$lowerThanFive = array_filter(

    $data,

    function( $current ) {

        return ( $current <= 5 );
    }
);

printf(

    "<ul>\n    <li>%s</li>\n</ul>",

    implode( "</li>\n    <li>", $lowerThanFive )
);

printf(

    "\n\n<ul>\n    <li>%s</li>\n</ul>",

    implode( "</li>\n    <li>", array_diff( $data, $lowerThanFive ) )
);

Note that because it is an example, I have created two distinct non-ordered lists, mainly to demonstrate that it works.

Instead of displaying inside the foreach, store these values within a string and when you finish the look print the larger $ and then the smaller $

$numeros = array(1, 2, 3, 4, 5, 6, 7, 8, 9);
$maiores='';
$menores='';
echo '<ul>';
foreach($numeros as $numero){
if($numero > 5){
    $maiores.= '<li>'.$numero.'</li>';
}else{
    $menores.= '<li>'.$numero.'</li>';
  }
}
echo $maiores;
echo $menores;
echo '</ul>';

A simpler way to solve this, taking into account that the important thing is to select from the highest to the lowest and to gain performance:

$numeros = array(1, 2, 3, 4, 5, 6, 7, 8, 9);
rsort($numeros);

foreach($numeros as $numeroSelecionado)
{
    echo $numeroSelecionado.'<br/>';
}