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<title>[47610] trunk/src/wp-includes: Docs: Document the default value of `$single` and `$prev_value` parameters in various metadata functions.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/47610">47610</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/47610","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2020-04-22 09:38:12 +0000 (Wed, 22 Apr 2020)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Docs: Document the default value of `$single` and `$prev_value` parameters in various metadata functions.
Props denisco.
See <a href="https://core.trac.wordpress.org/ticket/49572">#49572</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludescommentphp">trunk/src/wp-includes/comment.php</a></li>
<li><a href="#trunksrcwpincludesmetaphp">trunk/src/wp-includes/meta.php</a></li>
<li><a href="#trunksrcwpincludesmssitephp">trunk/src/wp-includes/ms-site.php</a></li>
<li><a href="#trunksrcwpincludespostphp">trunk/src/wp-includes/post.php</a></li>
<li><a href="#trunksrcwpincludestaxonomyphp">trunk/src/wp-includes/taxonomy.php</a></li>
<li><a href="#trunksrcwpincludesuserphp">trunk/src/wp-includes/user.php</a></li>
</ul>
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<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludescommentphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/comment.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/comment.php 2020-04-21 20:04:29 UTC (rev 47609)
+++ trunk/src/wp-includes/comment.php 2020-04-22 09:38:12 UTC (rev 47610)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -450,7 +450,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param int $comment_id Comment ID.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $meta_key Metadata name.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param mixed $meta_value Metadata value.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param bool $unique Optional, default is false. Whether the same key should not be added.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param bool $unique Optional. Whether the same key should not be added. Default false.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return int|bool Meta ID on success, false on failure.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function add_comment_meta( $comment_id, $meta_key, $meta_value, $unique = false ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -484,7 +484,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @param int $comment_id Comment ID.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $key Optional. The meta key to retrieve. By default, returns data for all keys.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param bool $single Whether to return a single value.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param bool $single Optional. Whether to return a single value. Default false.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return mixed Will be an array if $single is false. Will be value of meta data field if $single
</span><span class="cx" style="display: block; padding: 0 10px"> * is true.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -506,7 +506,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param int $comment_id Comment ID.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $meta_key Metadata key.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param mixed $meta_value Metadata value.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param mixed $prev_value Optional. Previous value to check before removing.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param mixed $prev_value Optional. Previous value to check before updating. Default empty.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return int|bool Meta ID if the key didn't exist, true on successful update, false on failure.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function update_comment_meta( $comment_id, $meta_key, $meta_value, $prev_value = '' ) {
</span></span></pre></div>
<a id="trunksrcwpincludesmetaphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/meta.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/meta.php 2020-04-21 20:04:29 UTC (rev 47609)
+++ trunk/src/wp-includes/meta.php 2020-04-22 09:38:12 UTC (rev 47610)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -149,7 +149,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $meta_key Metadata key.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param mixed $meta_value Metadata value. Must be serializable if non-scalar.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param mixed $prev_value Optional. If specified, only update existing metadata entries
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * with this value. Otherwise, update all entries.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * with this value. Otherwise, update all entries. Default empty.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return int|bool The new meta field ID if a field with the given key didn't exist and was
</span><span class="cx" style="display: block; padding: 0 10px"> * therefore added, true on successful update, false on failure.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span></span></pre></div>
<a id="trunksrcwpincludesmssitephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/ms-site.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/ms-site.php 2020-04-21 20:04:29 UTC (rev 47609)
+++ trunk/src/wp-includes/ms-site.php 2020-04-22 09:38:12 UTC (rev 47610)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1096,7 +1096,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param int $site_id Site ID.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $meta_key Metadata key.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param mixed $meta_value Metadata value. Must be serializable if non-scalar.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param mixed $prev_value Optional. Previous value to check before removing.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param mixed $prev_value Optional. Previous value to check before updating.
</ins><span class="cx" style="display: block; padding: 0 10px"> * Default empty.
</span><span class="cx" style="display: block; padding: 0 10px"> * @return int|bool Meta ID if the key didn't exist, true on successful update,
</span><span class="cx" style="display: block; padding: 0 10px"> * false on failure.
</span></span></pre></div>
<a id="trunksrcwpincludespostphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/post.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/post.php 2020-04-21 20:04:29 UTC (rev 47609)
+++ trunk/src/wp-includes/post.php 2020-04-22 09:38:12 UTC (rev 47610)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2136,7 +2136,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param int $post_id Post ID.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $meta_key Metadata key.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param mixed $meta_value Metadata value. Must be serializable if non-scalar.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param mixed $prev_value Optional. Previous value to check before updating.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param mixed $prev_value Optional. Previous value to check before updating. Default empty.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return int|bool The new meta field ID if a field with the given key didn't exist and was
</span><span class="cx" style="display: block; padding: 0 10px"> * therefore added, true on successful update, false on failure.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span></span></pre></div>
<a id="trunksrcwpincludestaxonomyphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/taxonomy.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/taxonomy.php 2020-04-21 20:04:29 UTC (rev 47609)
+++ trunk/src/wp-includes/taxonomy.php 2020-04-22 09:38:12 UTC (rev 47610)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1246,8 +1246,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @param int $term_id Term ID.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $key Optional. The meta key to retrieve. If no key is provided, fetches all metadata for the term.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param bool $single Whether to return a single value. If false, an array of all values matching the
- * `$term_id`/`$key` pair will be returned. Default: false.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param bool $single Optional. Whether to return a single value. If false, an array of all values matching the
+ * `$term_id`/`$key` pair will be returned. Default false.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return mixed If `$single` is false, an array of metadata values. If `$single` is true, a single metadata value.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function get_term_meta( $term_id, $key = '', $single = false ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1266,7 +1266,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param int $term_id Term ID.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $meta_key Metadata key.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param mixed $meta_value Metadata value.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param mixed $prev_value Optional. Previous value to check before removing.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param mixed $prev_value Optional. Previous value to check before updating. Default empty.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return int|WP_Error|bool Meta ID if the key didn't previously exist. True on successful update.
</span><span class="cx" style="display: block; padding: 0 10px"> * WP_Error when term_id is ambiguous between taxonomies. False on failure.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span></span></pre></div>
<a id="trunksrcwpincludesuserphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/user.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/user.php 2020-04-21 20:04:29 UTC (rev 47609)
+++ trunk/src/wp-includes/user.php 2020-04-22 09:38:12 UTC (rev 47610)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -821,7 +821,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @param int $user_id User ID.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $key Optional. The meta key to retrieve. By default, returns data for all keys.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param bool $single Whether to return a single value.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param bool $single Optional. Whether to return a single value. Default false.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return mixed Will be an array if $single is false. Will be value of meta data field if $single is true.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function get_user_meta( $user_id, $key = '', $single = false ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -842,7 +842,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param int $user_id User ID.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $meta_key Metadata key.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param mixed $meta_value Metadata value.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param mixed $prev_value Optional. Previous value to check before removing.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param mixed $prev_value Optional. Previous value to check before updating. Default empty.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return int|bool Meta ID if the key didn't exist, true on successful update, false on failure.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function update_user_meta( $user_id, $meta_key, $meta_value, $prev_value = '' ) {
</span></span></pre>
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