CODEWITHSUNDEEP
phparrays
user3955242
user3955242

Reputation:

PHP : How to avoid any white spaces or empty string in an array

I want to avoid any empty string in an array or any kind of white space. I'm using the following code:

<?php
$str="category 1
      category 2


      category 3

      category 4

      ";
$var = nl2br($str);

echo $var."<br>";
$arr = explode("\n", $var);

var_dump($arr); echo "<br>";
for($i = 0; $i < count($arr); $i++) {

    if(($arr[$i]) != '')
    {
        echo $arr[$i]."</br>";      
    }
}
?>

How can I remove the white space or empty string like the 2,3,5 index in the array which don't have needed string.

Upvotes: 1

Views: 111

Answers (3)

user3955242
user3955242

Reputation:

Finally I've solved it using the following code. Thanks everyone for you help.

<?php
$str="category 1
category 2


category 3

category 4




";
$arr = explode("\n", $str);
var_dump($arr);
$result = array();
for($i=0;$i<count($arr);$i++) {
     if(!preg_match("/^\s*$/", $arr[$i])) $result[] = $arr[$i];
}
$arr = $result;
var_dump($arr);

    for($i = 0; $i < count($arr); $i++){

        echo $arr[$i]."</br>";

}?>

Upvotes: 0

the_pete
the_pete

Reputation: 822

Your code was pretty much correct, but as was pointed out, your nl2br was adding a <br> to the end of each line and thus making this a harder process than it should have been.

$str="category 1
category 2


category 3

category 4

";
$arr = explode("\n", $str);
var_dump($arr); echo "<br>";
    for($i = 0; $i < count($arr); $i++){
    if(($arr[$i]) != '')
    {
        echo $arr[$i]."</br>";
    }
}

I used your old code and just removed the nl2br line as well as initial echo and from there onward, your code actually accomplishes your goal because the explode("\n", $str) is all that you need to split on empty lines and your if statement covers any lines that happen to be only whitespace.

Upvotes: 0

JustOnUnderMillions
JustOnUnderMillions

Reputation: 3795

$array = array_filter(array_map('trim',$array));

Removes all empty values and removes everywhere spaces before and after content!

Upvotes: 1

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