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PHP Cross Reference of WordPress Trunk (Updated Daily)
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Function and Method Cross Reference
is_404()
Defined at:
/wp-includes/query.php
->
line 865
/wp-includes/class-wp-query.php
->
line 4801
Referenced 25 times:
/wp-includes/query.php
->
line 886
/wp-includes/query.php
->
line 1076
/wp-includes/post-template.php
->
line 673
/wp-includes/post-template.php
->
line 822
/wp-content/themes/twentyeleven/header.php
->
line 38
/wp-content/themes/twentyten/header.php
->
line 37
/wp-includes/blocks/breadcrumbs.php
->
line 69
/wp-includes/theme-compat/sidebar.php
->
line 35
/wp-includes/theme-compat/sidebar.php
->
line 40
/wp-content/themes/twentyeleven/footer.php
->
line 22
/wp-includes/ms-functions.php
->
line 2208
/wp-includes/class-wp.php
->
line 743
/wp-includes/embed.php
->
line 1139
/wp-includes/embed.php
->
line 1168
/wp-includes/embed.php
->
line 1186
/wp-includes/general-template.php
->
line 1409
/wp-includes/general-template.php
->
line 1457
/wp-includes/general-template.php
->
line 1632
/wp-content/themes/twentythirteen/functions.php
->
line 435
/wp-content/themes/twentythirteen/functions.php
->
line 786
/wp-content/themes/twentytwelve/functions.php
->
line 332
/wp-content/themes/twentyfourteen/functions.php
->
line 703
/wp-includes/canonical.php
->
line 147
/wp-includes/canonical.php
->
line 688
/wp-includes/canonical.php
->
line 1042
Generated : Sun Aug 16 08:20:24 2026
Cross-referenced by
PHPXref