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<?php
namespace ipl\Stdlib;
/**
* Collection of string manipulation functions
*/
class Str
{
/**
* Convert the given string to camel case
*
* The given string may be delimited by the following characters: '_' (underscore), '-' (dash), ' ' (space).
*
* @param ?string $subject
*
* @return string
*/
public static function camel(?string $subject)
{
if ($subject === null) {
return '';
}
$normalized = str_replace(['-', '_'], ' ', $subject);
return lcfirst(str_replace(' ', '', ucwords(strtolower($normalized))));
}
/**
* Check if the given string starts with the specified substring
*
* @param ?string $subject
* @param string $start
* @param bool $caseSensitive
*
* @return bool
*/
public static function startsWith(?string $subject, string $start, bool $caseSensitive = true)
{
$subject = $subject ?? '';
if (! $caseSensitive) {
return strncasecmp($subject, $start, strlen($start)) === 0;
}
return substr($subject, 0, strlen($start)) === $start;
}
/**
* Split string into an array padded to the size specified by limit
*
* This method is a perfect fit if you need default values for symmetric array destructuring.
*
* @param ?string $subject
* @param string $delimiter
* @param int $limit
* @param mixed $default
*
* @return array<int, mixed>
*/
public static function symmetricSplit(?string $subject, string $delimiter, int $limit, $default = null)
{
if ($subject === null) {
return array_pad([], $limit, $default);
}
return array_pad(explode($delimiter, $subject, $limit), $limit, $default);
}
/**
* Split string into an array and trim spaces
*
* @param ?string $subject
* @param string $delimiter
* @param ?int $limit
*
* @return array<string>
*/
public static function trimSplit(?string $subject, string $delimiter = ',', int $limit = null)
{
if ($subject === null) {
return [];
}
if ($limit !== null) {
$exploded = explode($delimiter, $subject, $limit);
} else {
$exploded = explode($delimiter, $subject);
}
return array_map('trim', $exploded);
}
}
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