有沒有png2wbmp函數的使用示例？看這段PHP代碼如何轉換PNG為WBMP

gitbox 2025-08-24
<span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// 這部分代碼與正文內容無關，用於示範文章結構分隔</span></span><span>

</span><span><span class="hljs-comment">// 假設這是文章開頭的一些無關代碼</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">"這只是個無關函數"</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函數將PNG圖片轉換為WBMP格式</span></span><span>

</span><span><span class="hljs-comment">// png2wbmp函數介紹：</span></span><span>
</span><span><span class="hljs-comment">// png2wbmp() 函數用於將PNG格式的圖像轉換成WBMP格式圖像。</span></span><span>
</span><span><span class="hljs-comment">// 文法：bool png2wbmp ( string $srcfile , string $destfile [, int $threshold = 128 ] )</span></span><span>
</span><span><span class="hljs-comment">// 參數說明：</span></span><span>
</span><span><span class="hljs-comment">// - $srcfile：源PNG文件路徑。</span></span><span>
</span><span><span class="hljs-comment">// - $destfile：目標WBMP文件路徑。</span></span><span>
</span><span><span class="hljs-comment">// - $threshold（可選）：黑白閾值，預設128，決定哪些像素被視為黑色。</span></span><span>

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

</span><span><span class="hljs-variable">$src</span></span><span> = </span><span><span class="hljs-string">'input.png'</span></span><span>;     </span><span><span class="hljs-comment">// 輸入的PNG文件路徑</span></span><span>
</span><span><span class="hljs-variable">$dest</span></span><span> = </span><span><span class="hljs-string">'output.wbmp'</span></span><span>;  </span><span><span class="hljs-comment">// 輸出的WBMP文件路徑</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">$result</span></span><span>) {
        </span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"PNG成功轉換為WBMP，文件保存為：<span class="hljs-subst">{$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">"轉換失敗，请检查文件路徑或格式。"</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，請確認路徑：<span class="hljs-subst">{$src}</span></span></span><span>";
}
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>
png2wbmp