WordPress at a glance
filter is not described

the_content filter-hook . WP 1.0

This filter is documented in wp-includes/post-template.php

Usage

add_filter( 'the_content', 'filter_function_name_8842' );
function filter_function_name_8842( $post_content ){
	// filter...

	return $post_content;
}
$post_content
-

Where the hook is called

WP_REST_Posts_Controller::prepare_item_for_response()
the_content
WP_REST_Revisions_Controller::prepare_item_for_response()
the_content
WP_REST_Attachments_Controller::prepare_item_for_response()
the_content
the_content()
the_content
get_the_content_feed()
the_content
do_trackbacks()
the_content
wp_trim_excerpt()
the_content
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 1683
$data['content']['rendered'] = post_password_required( $post ) ? '' : apply_filters( 'the_content', $post->post_content );
wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php 603
'rendered' => apply_filters( 'the_content', $post->post_content ),
wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php 689
'rendered' => apply_filters( 'the_content', $post->post_content ),
wp-includes/post-template.php 253
$content = apply_filters( 'the_content', $content );
wp-includes/feed.php 194
$content = apply_filters( 'the_content', get_the_content() );
wp-includes/comment.php 2884
$excerpt = apply_filters( 'the_content', $post->post_content, $post->ID );
wp-includes/formatting.php 3819
$text = apply_filters( 'the_content', $text );

Where in WP core the hook is used WordPress

wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 764
remove_filter( 'the_content', 'wpautop', $priority );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 765
add_filter( 'the_content', '_restore_wpautop_hook', $priority + 1 );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 785
add_filter( 'the_content', 'wpautop', $current_priority - 1 );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 786
remove_filter( 'the_content', '_restore_wpautop_hook', $current_priority );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 32
add_filter( 'the_content', array( $this, 'run_shortcode' ), 8 );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 39
add_filter( 'the_content', array( $this, 'autoembed' ), 8 );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 142
add_filter( $filter, 'capital_P_dangit', 11 );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 172
add_filter( 'the_content', 'do_blocks', 9 );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 173
add_filter( 'the_content', 'wptexturize' );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 174
add_filter( 'the_content', 'convert_smilies', 20 );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 176
add_filter( 'the_content', 'shortcode_unautop' );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 177
add_filter( 'the_content', 'prepend_attachment' );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 178
add_filter( 'the_content', 'wp_filter_content_tags' );
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 533
add_filter( 'the_content', 'do_shortcode', 11 ); // AFTER wpautop().
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php 86
remove_filter( 'the_content', 'prepend_attachment' );