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<?php

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class WPML_String_Functions {

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public static function is_css_color( $string ) {

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return (bool) preg_match( '/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/im', $string );

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}

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public static function is_css_length( $string ) {

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$parts = explode( ' ', $string );

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foreach ( $parts as $part ) {

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if ( ! (bool) preg_match( '/^[+-]?[0-9]+.?([0-9]+)?(px|em|ex|ch|rem|vw|vh|vmin|vmax|%|in|cm|mm|pt|pc)$/im', $part ) &&

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'0' !== $part ) {

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return false;

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}

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}

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return true;

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}

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public static function is_numeric( $string ) {

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return (bool) is_numeric( $string );

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}

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public static function is_not_translatable( $string ) {

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return self::is_css_color( $string ) ||

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self::is_css_length( $string ) ||

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self::is_numeric( $string );

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}

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}

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