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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 |
|---|---|
| 1704 | $css_array = explode( ';', trim( $css ) ); |
| 1705 | |
| 1706 | /** |
| 1707 | * Filter list of allowed CSS attributes. |
| 1708 | * |
| 1709 | * @since 2.8.1 |
| 1710 | * |
| 1711 | * @param array $attr List of allowed CSS attributes. |
| 1712 | */ |
| 1713 | $allowed_attr = apply_filters( 'safe_style_css', array( 'text-align', 'margin', 'color', 'float', |
| 1714 | 'border', 'background', 'background-color', 'border-bottom', 'border-bottom-color', |
| 1715 | 'border-bottom-style', 'border-bottom-width', 'border-collapse', 'border-color', 'border-left', |
| 1716 | 'border-left-color', 'border-left-style', 'border-left-width', 'border-right', 'border-right-color', |
| 1717 | 'border-right-style', 'border-right-width', 'border-spacing', 'border-style', 'border-top', |
| 1718 | 'border-top-color', 'border-top-style', 'border-top-width', 'border-width', 'caption-side', |
| 1719 | 'clear', 'cursor', 'direction', 'font', 'font-family', 'font-size', 'font-style', |
| 1720 | 'font-variant', 'font-weight', 'height', 'min-height','max-height' , 'letter-spacing', 'line-height', 'margin-bottom', |
| 1721 | 'margin-left', 'margin-right', 'margin-top', 'overflow', 'padding', 'padding-bottom', |
| 1722 | 'padding-left', 'padding-right', 'padding-top', 'text-decoration', 'text-indent', 'vertical-align', |