Analysis of the working principle of PHP ereg_replace() function_PHP tutorial

We are learningPHP ereg_replace() function prototype: string ereg_replace (string $pattern, string $replacement, string $string)

string eregi_replace (string $pattern, string $replacement, string $string)

PHP ereg_replace() function c, and replace the matched result with $replacement. When $pattern contains pattern units (or sub-patterns), positions in the form of "1" or "$1" in $replacement will be replaced by the content matched by these sub-patterns. And "" or "$0" refers to the content of the entire matching string. It should be noted that the backslash is used as an escape character in double quotes, so you must use "

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<ol class="dp-xml"><li class="alt"><span><span class="tag"><</span><span> ?php   </span></span></li><li><span>$</span><span class="attribute">lines</span><span> = </span><span class="attribute-value">file</span><span>('source.php'); //将文件读入数组中  </span></li><li class="alt"><span>for($</span><span class="attribute">i</span><span>=</span><span class="attribute-value">0</span><span>; $i</span><span class="tag"><</span><span class="tag-name">count</span><span>($lines); $i++)  </span></li><li><span>{  </span></li><li class="alt"><span>//将行末以&ldquo;\&rdquo;或&ldquo;#&rdquo;开头的注释去掉  </span></li><li><span>$lines[$i] = eregi_replace("(//|#).*$", "", $lines[$i]);   </span></li><li class="alt"><span>//将行末的空白消除  </span></li><li><span>$lines[$i] = eregi_replace("[ nrtvf]*$", "rn", $lines[$i]);   </span></li><li class="alt"><span>}  </span></li><li><span>//整理后输出到页面  </span></li><li class="alt"><span>echo htmlspecialchars(join("",$lines));  </span></li><li><span class="tag">?></span><span> </span></span></li></ol>

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TechArticleWe are learning the PHP ereg_replace() function prototype: string ereg_replace (string $pattern, string $replacement, string $string ) string eregi_replace (string $pattern, string $replaceme...