缩排HTML的函数代码,PHP代码库,德仔网

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【PHP】缩排HTML的函数
作者: / 发布于2011/1/4/ 468
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            <pre style="line-height: 150%; font-family: Verdana, Monospace; font-size: 12px; font-weight: bold; margin-right: 10px"><span style="font-style: italic; color: #009933">/**</span>
<span style="font-style: italic; color: #009933">* This function will format/indent any XHTML code provided to it.</span>
<span style="font-style: italic; color: #009933">* It will automatically add tabs and line returns while trying to keep</span>
<span style="font-style: italic; color: #009933">* some of the original logical formatting.</span>
<span style="font-style: italic; color: #009933">* </span>
<span style="font-style: italic; color: #009933">* @param string $input Valid XHTML code. Invalid code will not be formatted correctly.</span>
<span style="font-style: italic; color: #009933">* @return string HTML code with code indents.</span>
<span style="font-style: italic; color: #009933">*/</span>
<span style="color: #0000ff">function</span> indent_html<span style="color: #009900">(</span><span style="color: #000088">$input</span><span style="color: #009900">)</span>
<span style="color: #009900">{</span>
  <span style="color: #000088">$stack</span> <span style="color: #339933">=</span> <span style="color: blue">array</span><span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
  <span style="color: #000088">$buffer</span> <span style="color: #339933">=</span> <span style="color: #0000ff">''</span><span style="color: #339933">;</span>
  <span style="color: #000088">$output</span> <span style="color: #339933">=</span> <span style="color: #0000ff">''</span><span style="color: #339933">;</span>

  <span style="font-style: italic; color: #666666">// Start main loop.</span>
  <span style="font-style: italic; color: #666666">// We stop when the buffer is the input.</span>
  <span style="color: #0099cc">while</span> <span style="color: #009900">(</span><span style="color: #000088">$buffer</span> <span style="color: #339933">!=</span> <span style="color: #000088">$input</span><span style="color: #009900">)</span>
  <span style="font-style: italic; color: #666666">//for ($x = 0; $x < 100 && $buffer != $input; $x++)</span>
  <span style="color: #009900">{</span>
    <span style="font-style: italic; color: #666666">// Determine the correct regular expression.</span>
    <span style="color: #0099cc">if</span> <span style="color: #009900">(</span><span style="color: #000088">$buffer</span> <span style="color: #339933">==</span> <span style="color: #0000ff">''</span><span style="color: #009900">)</span>
    <span style="color: #009900">{</span>
      <span style="font-style: italic; color: #666666">// Try to match with tag</span>
      <span style="color: #0099cc">if</span> <span style="color: #009900">(</span><span style="color: blue">preg_match</span><span style="color: #009900">(</span><span style="color: #0000ff">'/^(.*?)(<.+?>)/si'</span><span style="color: #339933">,</span> <span style="color: #000088">$input</span><span style="color: #339933">,</span> <span style="color: #000088">$matches</span><span style="color: #009900">)</span><span style="color: #009900">)</span>
      <span style="color: #009900">{</span>
        <span style="font-style: italic; color: #666666">// match hit; store</span>
        <span style="color: #000088">$text</span> <span style="color: #339933">=</span> <span style="color: #000088">$matches</span><span style="color: #009900">[</span><span style="color: #cc66cc">1</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
        <span style="color: #000088">$current</span> <span style="color: #339933">=</span> <span style="color: #000088">$matches</span><span style="color: #009900">[</span><span style="color: #cc66cc">2</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
      <span style="color: #009900">}</span>
      <span style="color: #0099cc">else</span>
      <span style="color: #009900">{</span>
        <span style="font-style: italic; color: #666666">// match failed, no tags present.</span>
        <span style="font-style: italic; color: #666666">// $input == $output</span>
        <span style="color: #0099cc">return</span> <span style="color: #000088">$input</span><span style="color: #339933">;</span>
      <span style="color: #009900">}</span>
    <span style="color: #009900">}</span>
    <span style="color: #0099cc">else</span>
    <span style="color: #009900">{</span>
      <span style="font-style: italic; color: #666666">// First try to match with tag at end.</span>
      <span style="color: #0099cc">if</span> <span style="color: #009900">(</span><span style="color: blue">preg_match</span><span style="color: #009900">(</span><span style="color: #0000ff">'/^('</span> <span style="color: #339933">.</span> <span style="color: blue">preg_quote</span><span style="color: #009900">(</span><span style="color: #000088">$buffer</span><span style="color: #339933">,</span> <span style="color: #0000ff">'/'</span><span style="color: #009900">)</span> <span style="color: #339933">.</span> <span style="color: #0000ff">')(.*?)(<.+?>)/si'</span><span style="color: #339933">,</span> <span style="color: #000088">$input</span><span style="color: #339933">,</span> <span style="color: #000088">$matches</span><span style="color: #009900">)</span><span style="color: #009900">)</span>
      <span style="color: #009900">{</span>
        <span style="font-style: italic; color: #666666">// Match hit; store</span>
        <span style="color: #000088">$text</span> <span style="color: #339933">=</span> <span style="color: #000088">$matches</span><span style="color: #009900">[</span><span style="color: #cc66cc">2</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
        <span style="color: #000088">$current</span> <span style="color: #339933">=</span> <span style="color: blue">isset</span><span style="color: #009900">(</span><span style="color: #000088">$matches</span><span style="color: #009900">[</span><span style="color: #cc66cc">3</span><span style="color: #009900">]</span><span style="color: #009900">)</span> ? <span style="color: #000088">$matches</span><span style="color: #009900">[</span><span style="color: #cc66cc">3</span><span style="color: #009900">]</span> <span style="color: #339933">:</span> <span style="color: #009900; font-weight: bold">null</span><span style="color: #339933">;</span>
      <span style="color: #009900">}</span>
      <span style="color: #0099cc">else</span>
      <span style="color: #009900">{</span>
        <span style="font-style: italic; color: #666666">// Match failed; try without</span>
        <span style="color: blue">preg_match</span><span style="color: #009900">(</span><span style="color: #0000ff">'/^('</span> <span style="color: #339933">.</span> <span style="color: blue">preg_quote</span><span style="color: #009900">(</span><span style="color: #000088">$buffer</span><span style="color: #339933">,</span> <span style="color: #0000ff">'/'</span><span style="color: #009900">)</span> <span style="color: #339933">.</span> <span style="color: #0000ff">')(.*)/si'</span><span style="color: #339933">,</span> <span style="color: #000088">$input</span><span style="color: #339933">,</span> <span style="color: #000088">$matches</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
        
        <span style="font-style: italic; color: #666666">// store</span>
        <span style="color: #000088">$current</span> <span style="color: #339933">=</span> <span style="color: #009900; font-weight: bold">null</span><span style="color: #339933">;</span>
        <span style="color: #000088">$text</span> <span style="color: #339933">=</span> <span style="color: #000088">$matches</span><span style="color: #009900">[</span><span style="color: #cc66cc">2</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
      <span style="color: #009900">}</span>
    <span style="color: #009900">}</span>

    <span style="font-style: italic; color: #666666">// Update buffer</span>
    <span style="color: #000088">$buffer</span> <span style="color: #339933">=</span> <span style="color: #000088">$matches</span><span style="color: #009900">[</span><span style="color: #cc66cc">0</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
    
    <span style="color: #000088">$text</span> <span style="color: #339933">=</span> <span style="color: blue">trim</span><span style="color: #009900">(</span><span style="color: #000088">$text</span><span style="color: #009900">)</span><span style="color: #339933">;</span>

    <span style="font-style: italic; color: #666666">// Matches text nodes</span>
    <span style="color: #0099cc">if</span> <span style="color: #009900">(</span><span style="color: #000088">$current</span> <span style="color: #339933">==</span> <span style="color: #009900; font-weight: bold">null</span><span style="color: #009900">)</span>
    <span style="color: #009900">{</span>
      <span style="color: #000088">$output</span> <span style="color: #339933">.=</span> <span style="color: blue">str_repeat</span><span style="color: #009900">(</span><span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\t</span>"</span><span style="color: #339933">,</span> <span style="color: blue">count</span><span style="color: #009900">(</span><span style="color: #000088">$stack</span><span style="color: #009900">)</span><span style="color: #009900">)</span> <span style="color: #339933">.</span> <span style="color: #000088">$text</span> <span style="color: #339933">.</span> <span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\n</span>"</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
    <span style="font-style: italic; color: #666666">// Matches ending tags </h1></span>
    <span style="color: #0099cc">elseif</span> <span style="color: #009900">(</span><span style="color: blue">substr</span><span style="color: #009900">(</span><span style="color: #000088">$current</span><span style="color: #339933">,</span> <span style="color: #cc66cc">1</span><span style="color: #339933">,</span> <span style="color: #cc66cc">1</span><span style="color: #009900">)</span> <span style="color: #339933">==</span> <span style="color: #0000ff">'/'</span><span style="color: #009900">)</span>
    <span style="color: #009900">{</span>
      <span style="color: #0099cc">if</span> <span style="color: #009900">(</span><span style="color: #000088">$text</span> <span style="color: #339933">!=</span> <span style="color: #0000ff">''</span><span style="color: #009900">)</span> <span style="color: #000088">$output</span> <span style="color: #339933">.=</span> <span style="color: blue">str_repeat</span><span style="color: #009900">(</span><span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\t</span>"</span><span style="color: #339933">,</span> <span style="color: blue">count</span><span style="color: #009900">(</span><span style="color: #000088">$stack</span><span style="color: #009900">)</span><span style="color: #009900">)</span> <span style="color: #339933">.</span> <span style="color: #000088">$text</span> <span style="color: #339933">.</span> <span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\n</span>"</span><span style="color: #339933">;</span>
      <span style="color: #000088">$output</span> <span style="color: #339933">.=</span> <span style="color: blue">str_repeat</span><span style="color: #009900">(</span><span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\t</span>"</span><span style="color: #339933">,</span> <span style="color: blue">count</span><span style="color: #009900">(</span><span style="color: #000088">$stack</span><span style="color: #009900">)</span> <span style="color: #339933">-</span> <span style="color: #cc66cc">1</span><span style="color: #009900">)</span> <span style="color: #339933">.</span> <span style="color: #000088">$current</span> <span style="color: #339933">.</span> <span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\n</span>"</span><span style="color: #339933">;</span>
      <span style="color: blue">array_pop</span><span style="color: #009900">(</span><span style="color: #000088">$stack</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
    <span style="font-style: italic; color: #666666">// Matches single tags (<img />)</span>
    <span style="color: #0099cc">elseif</span> <span style="color: #009900">(</span><span style="color: blue">substr</span><span style="color: #009900">(</span><span style="color: #000088">$current</span><span style="color: #339933">,</span> <span style="color: #339933">-</span><span style="color: #cc66cc">2</span><span style="color: #339933">,</span> <span style="color: #339933">-</span><span style="color: #cc66cc">1</span><span style="color: #009900">)</span> <span style="color: #339933">==</span> <span style="color: #0000ff">'/'</span><span style="color: #009900">)</span>
    <span style="color: #009900">{</span>
      <span style="color: #0099cc">if</span> <span style="color: #009900">(</span><span style="color: #000088">$text</span> <span style="color: #339933">!=</span> <span style="color: #0000ff">''</span><span style="color: #009900">)</span> <span style="color: #000088">$output</span> <span style="color: #339933">.=</span> <span style="color: blue">str_repeat</span><span style="color: #009900">(</span><span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\t</span>"</span><span style="color: #339933">,</span> <span style="color: blue">count</span><span style="color: #009900">(</span><span style="color: #000088">$stack</span><span style="color: #009900">)</span><span style="color: #009900">)</span> <span style="color: #339933">.</span> <span style="color: #000088">$text</span> <span style="color: #339933">.</span> <span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\n</span>"</span><span style="color: #339933">;</span>
      <span style="color: #000088">$output</span> <span style="color: #339933">.=</span> <span style="color: blue">str_repeat</span><span style="color: #009900">(</span><span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\t</span>"</span><span style="color: #339933">,</span> <span style="color: blue">count</span><span style="color: #009900">(</span><span style="color: #000088">$stack</span><span style="color: #009900">)</span> <span style="color: #009900">)</span> <span style="color: #339933">.</span> <span style="color: #000088">$current</span> <span style="color: #339933">.</span> <span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\n</span>"</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
    <span style="font-style: italic; color: #666666">// Matches start tags <h1></span>
    <span style="color: #0099cc">else</span>
    <span style="color: #009900">{</span>
      <span style="color: #0099cc">if</span> <span style="color: #009900">(</span><span style="color: #000088">$text</span> <span style="color: #339933">!=</span> <span style="color: #0000ff">''</span><span style="color: #009900">)</span> <span style="color: #000088">$output</span> <span style="color: #339933">.=</span> <span style="color: blue">str_repeat</span><span style="color: #009900">(</span><span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\t</span>"</span><span style="color: #339933">,</span> <span style="color: blue">count</span><span style="color: #009900">(</span><span style="color: #000088">$stack</span><span style="color: #009900">)</span><span style="color: #009900">)</span> <span style="color: #339933">.</span> <span style="color: #000088">$text</span> <span style="color: #339933">.</span> <span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\n</span>"</span><span style="color: #339933">;</span>
      <span style="color: #000088">$stack</span><span style="color: #009900">[</span><span style="color: #009900">]</span> <span style="color: #339933">=</span> <span style="color: #000088">$current</span><span style="color: #339933">;</span>
      <span style="color: #000088">$output</span> <span style="color: #339933">.=</span> <span style="color: blue">str_repeat</span><span style="color: #009900">(</span><span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\t</span>"</span><span style="color: #339933">,</span> <span style="color: blue">count</span><span style="color: #009900">(</span><span style="color: #000088">$stack</span><span style="color: #009900">)</span> <span style="color: #339933">-</span> <span style="color: #cc66cc">1</span><span style="color: #009900">)</span> <span style="color: #339933">.</span> <span style="color: #000088">$current</span> <span style="color: #339933">.</span> <span style="color: #0000ff">"<span style="color: #000099; font-weight: bold">\n</span>"</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
  <span style="color: #009900">}</span>

  <span style="color: #0099cc">return</span> <span style="color: #000088">$output</span><span style="color: #339933">;</span>
<span style="color: #009900">}</span></pre>
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