本篇文章給大家帶來的內容是關於PHP通過 realpath將相對路徑轉換為絕對路徑的代碼執行個體,有一定的參考價值,有需要的朋友可以參考一下,希望對你有所協助。
相對路徑 -> 絕對路徑:
<?php/** * @param string $in_rel: relative directory * @param string $out_abs: absolute directory */define('PATH_MAX', 255);function sub_rel2abs(string $in_rel, string &$out_abs) { $i_rtn = 0; // return value $ss_rel = ""; // for relative path build $st_fpos = 0; // front separator index $sv_path = []; // pide path to array $st_pos = strpos($in_rel, DIRECTORY_SEPARATOR); $npos = 0; while ($npos != $st_pos) { if ($st_pos != 0) { array_push($sv_path, substr($in_rel, $st_fpos, $st_pos - $st_fpos)); }// next... $st_fpos = $st_pos; // set current pos to last pos $st_pos++; // from next index $st_pos = strpos($in_rel, DIRECTORY_SEPARATOR, $st_pos); // next separator index } // while ( $npos != $st_pos )// final separator array_push($sv_path, substr($in_rel, $st_fpos)); $lpc = 0; // loop count $i_max = count($sv_path); while ($lpc < $i_max && 0 === $i_rtn) { $ss_rel .= $sv_path[$lpc];// relative path => relative path $c_abs = realpath($ss_rel); if ($c_abs === false) { $i_rtn = -1; } else { $ss_rel = $c_abs; $i_rtn = 0; } $lpc++; } // while (count($sv_path)>0) // normal ending if (0===$i_rtn) { $out_abs = $ss_rel; // set converted path } return $i_rtn;} // test$inDir = "/Users/Mch/Code/php/Directory";is_dir($inDir) || mkdir($inDir, 0777, true); $wd = __DIR__;chdir($inDir); $out = "";echo sub_rel2abs("../../../eclipse-workspace/blog.zip", $out).PHP_EOL;echo $out.PHP_EOL; chdir($wd);@rmdir($inDir);?>
output:
0/Users/Mch/eclipse-workspace/blog.zip
這裡直接realpath就可以了,為什麼多此一舉?