[ Blocksy ] Use custom social icons svg

functions.php

<?php
add_filter('blocksy:social-box:dynamic-social-networks', function ($networks) {
	$networks[] = [
		'id' => 'facebook',
		'name' => __('Facebook', 'blocksy'),
		'icon' => '<svg
		width="20px"
		height="20px"
		viewBox="0 0 20 20"
		aria-hidden="true">
			<path d="M10 20a10 10 0 1110-10 10 10 0 01-10 10zM10 .67A9.33 9.33 0 1019.33 10 9.33 9.33 0 0010 .67z"
			/>
			<path
			d="M12.22 5h-1.48C8.85 5 8.61 6.15 8.61 7.42v.91h-.94l-.1.06-.06.1a.41.41 0 000 .11v1.67a.41.41 0 000 .11l.06.1h.1a.2.2 0 00.11 0h.83v4.16a.37.37 0 000 .11l.06.1.1.06h1.81a.21.21 0 00.24-.28v-4.07h1.39a.2.2 0 00.11 0h.1a.25.25 0 00.07-.21V8.61a.25.25 0 00-.07-.21l-.1-.06h-1.5V7.5c.06-.35.06-.3.39-.28h1c.08 0 .16 0 .22-.06A.21.21 0 0012.5 7V5.28a.37.37 0 000-.11.21.21 0 00-.06-.1L12.33 5zm-.29 1.64h-.7c-.86 0-.94.47-.94.95v1a.27.27 0 00.09.21l.1.07H11.94V10h-1.35a.29.29 0 00-.21.09.27.27 0 00-.09.21v4.16H9.17v-4.18a.28.28 0 00-.28-.3h-.83V8.91h.95l.09-.07a.26.26 0 00.07-.21V7.41c0-1.24.25-1.83 1.57-1.83h1.18v1.06z"
			/>
		</svg>',
	];
	$networks[] = [
		'id' => 'twitter',
		'name' => __('Twitter', 'blocksy'),
		'icon' => '<svg
		width="20px"
		height="20px"
		viewBox="0 0 20 20"
		aria-hidden="true">
			<defs>
				<mask id="prefix__a" x="2.37" y="4.5" width="14.96" height="11" maskUnits="userSpaceOnUse">
					<path
						d="M15 6.51a2.09 2.09 0 00.17-.41.34.34 0 000-.2.34.34 0 00-.17-.17.33.33 0 00-.39 0 3.69 3.69 0 01-1 .43 2.49 2.49 0 00-1.64-.63 2.47 2.47 0 00-1.76.75 2.33 2.33 0 00-.52.83 2.4 2.4 0 00-.16 1A5.66 5.66 0 015.82 6a.41.41 0 00-.13-.1.45.45 0 00-.16 0 .44.44 0 00-.16.06.57.57 0 00-.11.11 2.47 2.47 0 00-.33 1.19 2.36 2.36 0 00.29 1.19l-.14.05a.41.41 0 00-.08.12.34.34 0 000 .17 2.44 2.44 0 00.85 1.85.4.4 0 00-.08.16.5.5 0 000 .17 2.42 2.42 0 001.4 1.51 3.89 3.89 0 01-2.18.37.37.37 0 00-.22.06.39.39 0 00-.14.17.3.3 0 000 .23.29.29 0 00.14.17 6.31 6.31 0 009.72-5.32v-.1a4.7 4.7 0 001-1.06.39.39 0 00.06-.21.32.32 0 00-.08-.2.32.32 0 00-.18-.12.37.37 0 00-.29.04zm-1.17 1.12a.45.45 0 00-.11.13.32.32 0 000 .17v.25a5.61 5.61 0 01-7.51 5.32 4.45 4.45 0 002-.89.3.3 0 00.12-.17.28.28 0 000-.2.3.3 0 00-.12-.17A.4.4 0 008 12a1.66 1.66 0 01-.79-.2 1.7 1.7 0 01-.62-.54 2.53 2.53 0 00.41-.08.29.29 0 00.18-.13.31.31 0 00.07-.21.32.32 0 00-.08-.21.31.31 0 00-.17-.11A1.78 1.78 0 015.67 9.3a3.09 3.09 0 00.52.07.35.35 0 00.34-.24.34.34 0 00-.14-.39 1.72 1.72 0 01-.66-.82 1.83 1.83 0 01-.07-1.06 6.31 6.31 0 004.2 1.9.34.34 0 00.28-.12.32.32 0 00.07-.3 1.79 1.79 0 01.89-1.95 1.78 1.78 0 011.11-.18 1.75 1.75 0 011 .53.42.42 0 00.14.09.37.37 0 00.18 0l.31-.07-.15.09a.49.49 0 00-.14.18.3.3 0 000 .23.34.34 0 00.36.23h.12c-.03.04-.13.1-.2.14z"
						fill="#fff" />
				</mask>
			</defs>
			<path d="M10 20a10 10 0 1110-10 10 10 0 01-10 10zM10 .67A9.33 9.33 0 1019.33 10 9.33 9.33 0 0010 .67z"
				/>
			<g mask="url(#prefix__a)">
				<path
					d="M15 6.51a2.09 2.09 0 00.17-.41.34.34 0 000-.2.34.34 0 00-.17-.17.33.33 0 00-.39 0 3.69 3.69 0 01-1 .43 2.49 2.49 0 00-1.64-.63 2.47 2.47 0 00-1.76.75 2.33 2.33 0 00-.52.83 2.4 2.4 0 00-.16 1A5.66 5.66 0 015.82 6a.41.41 0 00-.13-.1.45.45 0 00-.16 0 .44.44 0 00-.16.06.57.57 0 00-.11.11 2.47 2.47 0 00-.33 1.19 2.36 2.36 0 00.29 1.19l-.14.05a.41.41 0 00-.08.12.34.34 0 000 .17 2.44 2.44 0 00.85 1.85h0a.4.4 0 00-.08.16.5.5 0 000 .17 2.42 2.42 0 001.4 1.51 3.89 3.89 0 01-2.18.37.37.37 0 00-.22.06.39.39 0 00-.14.17.3.3 0 000 .23.29.29 0 00.14.17 6.31 6.31 0 009.72-5.32v-.1a4.7 4.7 0 001-1.06.39.39 0 00.06-.21.32.32 0 00-.08-.2.32.32 0 00-.18-.12.37.37 0 00-.29.04zm-1.17 1.12a.45.45 0 00-.11.13.32.32 0 000 .17v.25a5.61 5.61 0 01-7.51 5.32 4.45 4.45 0 002-.89.3.3 0 00.12-.17.28.28 0 000-.2.3.3 0 00-.12-.17A.4.4 0 008 12a1.66 1.66 0 01-.79-.2 1.7 1.7 0 01-.62-.54 2.53 2.53 0 00.41-.08.29.29 0 00.18-.13.31.31 0 00.07-.21.32.32 0 00-.08-.21.31.31 0 00-.17-.11A1.78 1.78 0 015.67 9.3a3.09 3.09 0 00.52.07.35.35 0 00.34-.24.34.34 0 00-.14-.39 1.72 1.72 0 01-.66-.82 1.83 1.83 0 01-.07-1.06 6.31 6.31 0 004.2 1.9.34.34 0 00.28-.12.32.32 0 00.07-.3 1.79 1.79 0 01.89-1.95 1.78 1.78 0 011.11-.18 1.75 1.75 0 011 .53.42.42 0 00.14.09.37.37 0 00.18 0l.31-.07-.15.09a.49.49 0 00-.14.18.3.3 0 000 .23.34.34 0 00.36.23h.12c-.03.04-.13.1-.2.14z"
					stroke-width="2" />
			</g>
		</svg>',
	];
	return $networks;
});