preg_match(
string $pattern,
string $subject,
array &$matches = null,
int $flags = 0,
int $offset = 0
): int|false
Given an image tag string, e.g.: <img src="value" class="value" alt="value" />, return a standard class containing the attribute values.
public function extractImageTagAttributes(string $imageTag) : \stdClass {
$attrs = new \stdClass();
foreach (['src', 'alt', 'class', 'style', 'title'] as $attr) {
$pattern = '/' . $attr . '="(.*?)"/';
$hasMatch = preg_match($pattern, $imageTag, $attrMatches);
$attrs->{$attr} = ($hasMatch) ? $attrMatches[1] : '';
}
return $attrs;
}
A person could write a knarly regex expression to do this in a single go, or use preg_match_all to match name="value" pairs. This provides a nice way of assigning empty strings to attributes that don’t exist in the tag.