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How to convert php into an absolute path: 1. Create a PHP sample file; 2. Convert the relative path through the "function sub_rel2abs(string $in_rel, string &$out_abs) {...}" method Just make it an absolute path.
The operating environment of this article: Windows 7 system, PHP version 7.4, DELL G3 computer
How to convert php to an absolute path?
PHP Convert relative path to absolute path realpath
* Relative path-> Absolute path realpath
<?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
Directly here Realpath is enough, why bother?
* Absolute path-> Relative path
<?php /** * $path相对于$base的相对路径 * @param string $base * @param string $path */ function abs2rel(string $base, string $path) { if (is_dir($base)) { $base = rtrim($base, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . "."; } $a = explode(DIRECTORY_SEPARATOR, $base); $b = explode(DIRECTORY_SEPARATOR, $path); $d = []; // $path push $i = count($a)-1; $sliceEquals = function($a, $b, $j) { if ($j >= count($a) || $j >= count($b)) { throw new Exception('$j out of range'); } for ($i = $j; $i >= 0; $i--) { if (strcmp($b[$i], $a[$i])!==0) { return false; } } return true; }; // 找到a,b数组元素相同的下标 while (array_pop($a)) { $i = count($a)-1; if (isset($b[$i])) { if ($sliceEquals($a, $b, $i)) { break; } } array_push($d, ".."); } // 从首个不同元素开始 for ($i+=1; $i < count($b); $i++) { array_push($d, $b[$i]); } return ".".DIRECTORY_SEPARATOR.implode(DIRECTORY_SEPARATOR, $d); }
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