str_pad

名稱:str_pad

分類:字符串

所屬語言:php

一句話介紹:把字符串填充為新的長度。

實例

例子1

填充字符串的右側，到30 個字符的新長度：

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">str_pad</span> <span class="token punctuation">(</span> <span class="token variable">$str</span> <span class="token punctuation">,</span> <span class="token number">30</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"."</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

親自試一試

例子2

填充字符串的左側：

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">str_pad</span> <span class="token punctuation">(</span> <span class="token variable">$str</span> <span class="token punctuation">,</span> <span class="token number">30</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"."</span> <span class="token punctuation">,</span> <span class="token constant">STR_PAD_LEFT</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

親自試一試

例子3

填充字符串的兩側：

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">str_pad</span> <span class="token punctuation">(</span> <span class="token variable">$str</span> <span class="token punctuation">,</span> <span class="token number">30</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">".:"</span> <span class="token punctuation">,</span> <span class="token constant">STR_PAD_BOTH</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

親自試一試