有没有png2wbmp函数的使用示例？看这段PHP代码如何转换PNG为WBMP

gitbox 2025-08-24
<span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// 这部分代码与正文内容无关，用于示范文章结构分隔</span></span><span>

</span><span><span class="hljs-comment">// 假设这是文章开头的一些无关代码</span></span><span>
</span><span><span class="hljs-function"><span class="hljs-keyword">function</span></span></span><span> </span><span><span class="hljs-title">dummyFunction</span></span><span>(</span><span><span class="hljs-params"></span></span><span>) {
    </span><span><span class="hljs-keyword">return</span></span><span> </span><span><span class="hljs-string">"这只是个无关函数"</span></span><span>;
}
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-title function_ invoke__">dummyFunction</span></span><span>();

</span><span><span class="hljs-meta">?&gt;</span></span><span>

&lt;hr&gt;

</span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// 正文部分：PHP中如何使用png2wbmp函数将PNG图片转换为WBMP格式</span></span><span>

</span><span><span class="hljs-comment">// png2wbmp函数介绍：</span></span><span>
</span><span><span class="hljs-comment">// png2wbmp() 函数用于将PNG格式的图像转换成WBMP格式图像。</span></span><span>
</span><span><span class="hljs-comment">// 语法：bool png2wbmp ( string $srcfile , string $destfile [, int $threshold = 128 ] )</span></span><span>
</span><span><span class="hljs-comment">// 参数说明：</span></span><span>
</span><span><span class="hljs-comment">// - $srcfile：源PNG文件路径。</span></span><span>
</span><span><span class="hljs-comment">// - $destfile：目标WBMP文件路径。</span></span><span>
</span><span><span class="hljs-comment">// - $threshold（可选）：黑白阈值，默认128，决定哪些像素被视为黑色。</span></span><span>

</span><span><span class="hljs-comment">// 使用示例：</span></span><span>

</span><span><span class="hljs-variable">$src</span></span><span> = </span><span><span class="hljs-string">'input.png'</span></span><span>;     </span><span><span class="hljs-comment">// 输入的PNG文件路径</span></span><span>
</span><span><span class="hljs-variable">$dest</span></span><span> = </span><span><span class="hljs-string">'output.wbmp'</span></span><span>;  </span><span><span class="hljs-comment">// 输出的WBMP文件路径</span></span><span>

</span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-title function_ invoke__">file_exists</span></span><span>(</span><span><span class="hljs-variable">$src</span></span><span>)) {
    </span><span><span class="hljs-variable">$result</span></span><span> = </span><span><span class="hljs-title function_ invoke__">png2wbmp</span></span><span>(</span><span><span class="hljs-variable">$src</span></span><span>, </span><span><span class="hljs-variable">$dest</span></span><span>);
    </span><span><span class="hljs-keyword">if</span></span><span> (</span><span><span class="hljs-variable">$result</span></span><span>) {
        </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"PNG成功转换为WBMP，文件保存为：<span class="hljs-subst">{$dest}</span></span></span><span>";
    } </span><span><span class="hljs-keyword">else</span></span><span> {
        </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"转换失败，请检查文件路径或格式。"</span></span><span>;
    }
} </span><span><span class="hljs-keyword">else</span></span><span> {
    </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"源文件不存在，请确认路径：<span class="hljs-subst">{$src}</span></span></span><span>";
}
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>
png2wbmp