显示内容的行数代码,PHP代码库,德仔网

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【PHP】显示内容的行数
作者:Dezai.CN / 发布于2011/6/11/ 473
<div><span style="color: rgb(0,0,0); font-weight: bold"><?</span>
<span style="color: rgb(0,0,0); font-weight: bold">function</span> how_many_lines<span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$width</span>, <span style="color: rgb(0,0,255)">$string</span>, <span style="color: rgb(0,0,255)">$options</span> = <a href="http://www.php.net/array" target="_blank"><span style="color: rgb(0,0,102)">array</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(102,204,102)">)</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span>!<a href="http://www.php.net/is_array" target="_blank"><span style="color: rgb(0,0,102)">is_array</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$options</span><span style="color: rgb(102,204,102)">)</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(0,0,255)">$options</span> = <a href="http://www.php.net/array" target="_blank"><span style="color: rgb(0,0,102)">array</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(102,204,102)">)</span>;
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$width</span> < <span style="color: rgb(204,102,204)">1</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<a href="http://www.php.net/trigger_error" target="_blank"><span style="color: rgb(0,0,102)">trigger_error</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(255,0,0)">'Width should be > 0'</span><span style="color: rgb(102,204,102)">)</span>;
<span style="color: rgb(177,177,0)">return</span> <span style="color: rgb(0,0,0); font-weight: bold">false</span>;
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(0,0,255)">$default_options</span> = <a href="http://www.php.net/array" target="_blank"><span style="color: rgb(0,0,102)">array</span></a><span style="color: rgb(102,204,102)">(</span>
<span style="color: rgb(255,0,0)">'white_spaces'</span> => <a href="http://www.php.net/array" target="_blank"><span style="color: rgb(0,0,102)">array</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(255,0,0)">' '</span>, <span style="color: rgb(255,0,0)">"<span style="color: rgb(0,0,153); font-weight: bold">\t</span>"</span><span style="color: rgb(102,204,102)">)</span>,
<span style="color: rgb(255,0,0)">'new_lines'</span> => <a href="http://www.php.net/array" target="_blank"><span style="color: rgb(0,0,102)">array</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(255,0,0)">"<span style="color: rgb(0,0,153); font-weight: bold">\r</span><span style="color: rgb(0,0,153); font-weight: bold">\n</span>"</span>, <span style="color: rgb(255,0,0)">"<span style="color: rgb(0,0,153); font-weight: bold">\n</span>"</span><span style="color: rgb(102,204,102)">)</span>,
<span style="color: rgb(255,0,0)">'force_line_breaks'</span> => <span style="color: rgb(0,0,0); font-weight: bold">true</span>,
<span style="color: rgb(255,0,0)">'callback'</span> => <span style="color: rgb(0,0,0); font-weight: bold">null</span>,
<span style="color: rgb(255,0,0)">'callback_params'</span> => <a href="http://www.php.net/array" target="_blank"><span style="color: rgb(0,0,102)">array</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(102,204,102)">)</span>,
<span style="color: rgb(255,0,0)">'char_widths'</span> => <span style="color: rgb(0,0,0); font-weight: bold">null</span>,
<span style="color: rgb(102,204,102)">)</span>;

<a href="http://www.php.net/extract" target="_blank"><span style="color: rgb(0,0,102)">extract</span></a><span style="color: rgb(102,204,102)">(</span><a href="http://www.php.net/array_merge" target="_blank"><span style="color: rgb(0,0,102)">array_merge</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$default_options</span>, <span style="color: rgb(0,0,255)">$options</span><span style="color: rgb(102,204,102)">)</span><span style="color: rgb(102,204,102)">)</span>;

<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$callback</span> == <span style="color: rgb(0,0,0); font-weight: bold">null</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$char_widths</span> != <span style="color: rgb(0,0,0); font-weight: bold">null</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$callback</span> = <a href="http://www.php.net/create_function" target="_blank"><span style="color: rgb(0,0,102)">create_function</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(255,0,0)">'$char, $char_map'</span>, <span style="color: rgb(255,0,0)">'return (isset($char_map[$char]) ? $char_map[$char] : 0);'</span><span style="color: rgb(102,204,102)">)</span>;
<span style="color: rgb(0,0,255)">$callback_params</span> = <a href="http://www.php.net/array" target="_blank"><span style="color: rgb(0,0,102)">array</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$char_widths</span><span style="color: rgb(102,204,102)">)</span>;
<span style="color: rgb(102,204,102)">}</span> <span style="color: rgb(177,177,0)">else</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$callback</span> = <a href="http://www.php.net/create_function" target="_blank"><span style="color: rgb(0,0,102)">create_function</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(255,0,0)">'$char'</span>, <span style="color: rgb(255,0,0)">'return 1;'</span><span style="color: rgb(102,204,102)">)</span>;
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(102,204,102)">}</span>

<span style="color: rgb(0,0,255)">$string</span> = <a href="http://www.php.net/str_replace" target="_blank"><span style="color: rgb(0,0,102)">str_replace</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$new_lines</span>, <span style="color: rgb(255,0,0)">"<span style="color: rgb(0,0,153); font-weight: bold">\n</span>"</span>, <span style="color: rgb(0,0,255)">$string</span><span style="color: rgb(102,204,102)">)</span>;
<span style="color: rgb(0,0,255)">$string</span> = <a href="http://www.php.net/str_replace" target="_blank"><span style="color: rgb(0,0,102)">str_replace</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$white_spaces</span>, <span style="color: rgb(255,0,0)">' '</span>, <span style="color: rgb(0,0,255)">$string</span><span style="color: rgb(102,204,102)">)</span>;

<span style="color: rgb(0,0,255)">$str_length</span> = <a href="http://www.php.net/strlen" target="_blank"><span style="color: rgb(0,0,102)">strlen</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$string</span><span style="color: rgb(102,204,102)">)</span>;

<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$str_length</span> > <span style="color: rgb(204,102,204)">0</span> && <span style="color: rgb(0,0,255)">$string</span><span style="color: rgb(102,204,102)">[</span><span style="color: rgb(0,0,255)">$str_length</span><span style="color: rgb(204,102,204)">-1</span><span style="color: rgb(102,204,102)">]</span> == <span style="color: rgb(255,0,0)">"<span style="color: rgb(0,0,153); font-weight: bold">\n</span>"</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$str_length</span>--;
<span style="color: rgb(102,204,102)">}</span>

<span style="color: rgb(0,0,255)">$sep</span> = <span style="color: rgb(204,102,204)">-1</span>;
<span style="color: rgb(0,0,255)">$pos</span> = <span style="color: rgb(0,0,255)">$j</span> = <span style="color: rgb(0,0,255)">$line_length</span> = <span style="color: rgb(204,102,204)">0</span>;
<span style="color: rgb(0,0,255)">$number_of_lines</span> = <span style="color: rgb(204,102,204)">1</span>;

<span style="color: rgb(177,177,0)">while</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$pos</span> < <span style="color: rgb(0,0,255)">$str_length</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$char</span> = <span style="color: rgb(0,0,255)">$string</span><span style="color: rgb(102,204,102)">[</span><span style="color: rgb(0,0,255)">$pos</span><span style="color: rgb(102,204,102)">]</span>;
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$char</span> == <span style="color: rgb(255,0,0)">"<span style="color: rgb(0,0,153); font-weight: bold">\n</span>"</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$number_of_lines</span>++;
<span style="color: rgb(0,0,255)">$pos</span>++;
<span style="color: rgb(0,0,255)">$sep</span> = <span style="color: rgb(204,102,204)">-1</span>;
<span style="color: rgb(0,0,255)">$j</span> = <span style="color: rgb(0,0,255)">$pos</span>;
<span style="color: rgb(0,0,255)">$line_length</span> = <span style="color: rgb(204,102,204)">0</span>;
<span style="color: rgb(102,204,102)">}</span> <span style="color: rgb(177,177,0)">else</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$char</span> == <span style="color: rgb(255,0,0)">' '</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$sep</span> = <span style="color: rgb(0,0,255)">$pos</span>;
<span style="color: rgb(102,204,102)">}</span>

<span style="color: rgb(0,0,255)">$line_length</span> += <a href="http://www.php.net/call_user_func_array" target="_blank"><span style="color: rgb(0,0,102)">call_user_func_array</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$callback</span>, <a href="http://www.php.net/array_merge" target="_blank"><span style="color: rgb(0,0,102)">array_merge</span></a><span style="color: rgb(102,204,102)">(</span><a href="http://www.php.net/array" target="_blank"><span style="color: rgb(0,0,102)">array</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$char</span><span style="color: rgb(102,204,102)">)</span>, <span style="color: rgb(0,0,255)">$callback_params</span><span style="color: rgb(102,204,102)">)</span><span style="color: rgb(102,204,102)">)</span>;
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$line_length</span> > <span style="color: rgb(0,0,255)">$width</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$sep</span> == <span style="color: rgb(204,102,204)">-1</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span>!<span style="color: rgb(0,0,255)">$force_line_breaks</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(177,177,0)">return</span> <span style="color: rgb(0,0,0); font-weight: bold">false</span>;
<span style="color: rgb(102,204,102)">}</span> <span style="color: rgb(177,177,0)">else</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$pos</span> == <span style="color: rgb(0,0,255)">$j</span><span style="color: rgb(102,204,102)">)</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$pos</span>++;
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(102,204,102)">}</span> <span style="color: rgb(177,177,0)">else</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$pos</span> = <span style="color: rgb(0,0,255)">$sep</span> + <span style="color: rgb(204,102,204)">1</span>;
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(0,0,255)">$sep</span> = <span style="color: rgb(204,102,204)">-1</span>;
<span style="color: rgb(0,0,255)">$j</span> = <span style="color: rgb(0,0,255)">$pos</span>;
<span style="color: rgb(0,0,255)">$line_length</span> = <span style="color: rgb(204,102,204)">0</span>;
<span style="color: rgb(0,0,255)">$number_of_lines</span>++;
<span style="color: rgb(102,204,102)">}</span> <span style="color: rgb(177,177,0)">else</span> <span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$pos</span>++;
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(102,204,102)">}</span>

<span style="color: rgb(177,177,0)">return</span> <span style="color: rgb(0,0,255)">$number_of_lines</span>;
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(0,0,0); font-weight: bold">?></span>
</div>
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