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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
1157 | /** |
1158 | * Filter whether a meta key is protected. |
1159 | * |
1160 | * @since 3.2.0 |
1161 | * |
1162 | * @param bool $protected Whether the key is protected. Default false. |
1163 | * @param string $meta_key Meta key. |
1164 | * @param string $meta_type Meta type. |
1165 | */ |
1166 | return apply_filters( 'is_protected_meta', $protected, $meta_key, $meta_type ); |
1167 | } |
1168 |
|
1169 | /** |
1170 | * Sanitize meta value. |
1171 | * |
1172 | * @since 3.1.3 |
1173 | * |
1174 | * @param string $meta_key Meta key |
1175 | * @param mixed $meta_value Meta value to sanitize |