brunomonteiro3 · December 7, 2016 23:44
diff --git a/img_p_class_content_filter.php b/img_p_class_content_filter.php
 <?php
 add_filter( 'the_content', 'img_p_class_content_filter', 20);

 function img_p_class_content_filter($content) {
 	$content = preg_replace("/(<p[^>]*)(\>.*)(\<img.*)(<\/p>)/im", "\$1 class='content-img-wrap'\$2\$3\$4", $content);
 	return $content;
 }
	<?php
	add_filter( 'the_content', 'img_p_class_content_filter', 20);

	function img_p_class_content_filter($content) {
	$content = preg_replace("/(<p[^>])(\>.)(\<img.*)(<\/p>)/im", "\$1 class='content-img-wrap'\$2\$3\$4", $content);
	return $content;
	}