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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 |
---|---|
2065 | * Filters the value of a specific post field before saving. |
2066 | * |
2067 | * The dynamic portion of the hook name, `$field`, refers to the post |
2068 | * field name. |
2069 | * |
2070 | * @since 2.3.0 |
2071 | * |
2072 | * @param mixed $value Value of the post field. |
2073 | */ |
2074 | $value = apply_filters( "{$field}_pre", $value ); |
2075 | } |
2076 | } else { |
2077 |
|
2078 | // Use display filters by default. |
2079 | if ( $prefixed ) { |
2080 |
|
2081 | /** |
2082 | * Filters the value of a specific post field for display. |
2083 | * |