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32 lines
896 B
32 lines
896 B
<?php
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namespace App\Support;
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/**
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* 将富文本/HTML 转为单行纯文本（去标签、解码实体、折叠空白）。
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*/
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final class HtmlToPlainText
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{
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public static function toSingleLine(?string $html): ?string
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{
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if ($html === null || $html === '') {
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return $html;
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}
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if (! str_contains($html, '<') && ! preg_match('/&[a-zA-Z#0-9]+;|&#\d+;|&#x[0-9a-fA-F]+;/', $html)) {
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$t = trim((string) preg_replace('/\s+/u', ' ', $html));
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$t = str_replace(["\r\n", "\r", "\n"], ' ', $t);
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return $t === '' ? null : trim($t);
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}
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$t = strip_tags($html);
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$t = html_entity_decode($t, ENT_QUOTES | ENT_HTML5, 'UTF-8');
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$t = (string) preg_replace('/\s+/u', ' ', $t);
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$t = str_replace(["\r\n", "\r", "\n"], ' ', $t);
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$t = trim($t);
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return $t === '' ? null : $t;
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}
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}
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