1. Use the idea of recursion
<span style="color: #0000ff">function</span> mkdirs_2(<span style="color: #800080">$path</span><span style="color: #000000">){ </span><span style="color: #0000ff">if</span>(!<span style="color: #008080">is_dir</span>(<span style="color: #800080">$path</span><span style="color: #000000">)){ mkdirs_2(</span><span style="color: #008080">dirname</span>(<span style="color: #800080">$path</span><span style="color: #000000">)); </span><span style="color: #0000ff">if</span>(!<span style="color: #008080">mkdir</span>(<span style="color: #800080">$path</span>, 0777<span style="color: #000000">)){ </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">; } } </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">true</span><span style="color: #000000">; } </span><span style="color: #008000">/*</span><span style="color: #008000"> http://www.manongjc.com/article/1331.html </span><span style="color: #008000">*/</span> <span style="color: #800080">$path2</span> = 'sdfs/sds/sds/s/s/sss'<span style="color: #000000">; </span><span style="color: #008080">var_dump</span>(mkdirs_2(<span style="color: #800080">$path2</span>)); <span style="color: #008000">//</span><span style="color: #008000">true;</span>
1. The main idea is to use recursion, first create dir, then create dir/css, then create...
2. Recursion is the process of pushing onto the stack, So let dir/css/js/php/ok be pushed onto the stack first, then it will pop out last... I won’t say anything else.
3.dirname(path) returns is the value of the path except the last directory, that is, the first return is: dir/css/js/php,, the second return is dir/css/js,, and the last return is ./
2. Create directly using mkdir(), the third parameter must be true to automatically create multi-level directories
<span style="color: #0000ff">function</span> mkdirs_1(<span style="color: #800080">$path</span>, <span style="color: #800080">$mode</span> = 0777<span style="color: #000000">){ </span><span style="color: #0000ff">if</span>(<span style="color: #008080">is_dir</span>(<span style="color: #800080">$path</span><span style="color: #000000">)){ </span><span style="color: #0000ff">return</span> '无法创建,已经是目录了'<span style="color: #000000">; }</span><span style="color: #0000ff">else</span><span style="color: #000000">{ </span><span style="color: #0000ff">if</span>(<span style="color: #008080">mkdir</span>(<span style="color: #800080">$path</span>, <span style="color: #800080">$mode</span>, <span style="color: #0000ff">true</span><span style="color: #000000">)) { </span><span style="color: #0000ff">return</span> '创建成功'<span style="color: #000000">; }</span><span style="color: #0000ff">else</span><span style="color: #000000">{ </span><span style="color: #0000ff">return</span> '创建失败'<span style="color: #000000">; } } } </span><span style="color: #008000">/*</span><span style="color: #008000"> http://www.manongjc.com/article/1332.html </span><span style="color: #008000">*/</span> <span style="color: #800080">$path1</span> = 'a/b/c/d/e'<span style="color: #000000">; </span><span style="color: #008080">var_dump</span>(mkdirs_1(<span style="color: #800080">$path1</span>)); <span style="color: #008000">//</span><span style="color: #008000">string '创建成功' (length=12)</span>

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