Determines whether a post has an image attached.
wp_rand
Generates a random number.
wp_verify_nonce_failed
Fires when nonce verification fails.
wp_mail_failed
Fires after a phpmailerException is caught.
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get_user_by
Retrieve user info by a given field
expiration_of_site_transient_{$transient}
Filters the expiration for a site transient before its value is set.
set_site_transient_{$transient}
Fires after the value for a specific site transient has been set.
pre_set_site_transient_{$transient}
Filters the value of a specific site transient before it is set.
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site_transient_{$transient}
Filters the value of an existing site transient.
pre_site_transient_{$transient}
Filters the value of an existing site transient.
update_network_option
Updates the value of a network option that was already added.
pre_update_site_option_{$option}
Filters a specific network option before its value is updated.
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delete_network_option
Removes a network option by name.
pre_delete_site_option_{$option}
Fires immediately before a specific network option is deleted.
add_network_option
Adds a new network option.