How to Avoid Empty Elements When Exploding Strings in PHP?

Explode String into Array Disregarding Empty Elements

When utilizing PHP's explode function to segment a string into an array based on a specified substring, it's possible to encounter empty strings in the result when there are consecutive or leading/trailing delimiters. This can be problematic when seeking to work with a concise array.

Introducing a Solution: preg_split

To address this issue and exclude empty strings from the resulting array, consider employing the preg_split function instead. Here's how it works:

$exploded = preg_split('@/@', '1/2//3/', -1, PREG_SPLIT_NO_EMPTY);

Breaking Down the Code:

• preg_split('@/@'): This regular expression delimits the string using the forward slash (/) as a substring.
• -1: Indicating that all occurrences of the delimiter should be matched.
• PREG_SPLIT_NO_EMPTY: An optional flag that excludes empty elements from the resulting array.

Output:

var_dump($exploded);
array(3) {
  [0]=>
  string(1) "1"
  [1]=>
  string(1) "2"
  [2]=>
  string(1) "3"
}

As demonstrated, the preg_split function successfully parses the input string into an array, excluding empty elements.

By implementing preg_split with the PREG_SPLIT_NO_EMPTY flag, you can effortlessly eliminate empty strings from your string explosions, resulting in concise arrays for your programming needs.

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