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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 |
|---|---|
| 901 | * |
| 902 | * The dynamic portion of the hook name, `$transient`, refers to the transient name. |
| 903 | * |
| 904 | * @since 2.8.0 |
| 905 | * @since 4.4.0 The `$transient` parameter was added |
| 906 | * |
| 907 | * @param mixed $value Value of transient. |
| 908 | * @param string $transient Transient name. |
| 909 | */ |
| 910 | return apply_filters( "transient_{$transient}", $value, $transient ); |
| 911 | } |
| 912 | |
| 913 | /** |
| 914 | * Sets/updates the value of a transient. |
| 915 | * |
| 916 | * You do not need to serialize values. If the value needs to be serialized, |
| 917 | * then it will be serialized before it is set. |
| 918 | * |
| 919 | * @since 2.8.0 |