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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 |
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1943 |
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1944 | /** |
1945 | * Filters the Custom CSS Output into the <head>. |
1946 | * |
1947 | * @since 4.7.0 |
1948 | * |
1949 | * @param string $css CSS pulled in from the Custom CSS post type. |
1950 | * @param string $stylesheet The theme stylesheet name. |
1951 | */ |
1952 | $css = apply_filters( 'wp_get_custom_css', $css, $stylesheet ); |
1953 |
|
1954 | return $css; |
1955 | } |
1956 |
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1957 | /** |
1958 | * Updates the `custom_css` post for a given theme. |
1959 | * |
1960 | * Inserts a `custom_css` post when one doesn't yet exist. |
1961 | * |