array_map
Wenden Sie eine Rückruffunktion für jedes Element des Arrays an
Deutsch
Deutsch
Wenden Sie die Funktion auf jeden Wert im Array an, multiplizieren Sie jeden Wert an sich selbst und geben Sie ein Array mit dem neuen Wert zurück:
<span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token keyword">Funktion</span> <span class="token function-definition function">myfunktion</span> <span class="token punctuation">(</span> <span class="token variable">$ v</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span> <span class="token variable">$ v</span> <span class="token operator">*</span> <span class="token variable">$ v</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$ A</span> <span class="token operator">=</span> <span class="token keyword">Array</span> <span class="token punctuation">(</span> <span class="token number">1</span> <span class="token punctuation">,</span> <span class="token number">2</span> <span class="token punctuation">,</span> <span class="token number">3</span> <span class="token punctuation">,</span> <span class="token number">4</span> <span class="token punctuation">,</span> <span class="token number">5</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">array_map</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">,</span> <span class="token variable">$ a</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>
Verwenden Sie benutzerdefinierte Funktionen, um den Wert eines Arrays zu ändern:
<span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token keyword">Funktion</span> <span class="token function-definition function">myfunktion</span> <span class="token punctuation">(</span> <span class="token variable">$ v</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span> <span class="token variable">$ v</span> <span class="token operator">===</span> <span class="token string double-quoted-string">"Hund"</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">zurück</span> <span class="token string double-quoted-string">"fido"</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">Return</span> <span class="token variable">$ V</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">Array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Pferd"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Hund"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Katze"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">array_map</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">,</span> <span class="token variable">$ a</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>
Verwenden Sie zwei Arrays:
<span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token keyword">Funktion</span> <span class="token function-definition function">myfunktion</span> <span class="token punctuation">(</span> <span class="token variable">$ v1</span> <span class="token punctuation">,</span> <span class="token variable">$ v2</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span> <span class="token variable">$ v1</span> <span class="token operator">===</span> <span class="token variable">$ v2</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">zurück</span> <span class="token string double-quoted-string">"gleich"</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">zurück</span> <span class="token string double-quoted-string">"anders"</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$ a1</span> <span class="token operator">=</span> <span class="token keyword">Array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Pferd"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Hund"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Katze"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token variable">$ a2</span> <span class="token operator">=</span> <span class="token keyword">Array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Kuh"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Hund"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Ratte"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">array_map</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">,</span> <span class="token variable">$ a1</span> <span class="token punctuation">,</span> <span class="token variable">$ a2</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>
Ändern Sie alle Buchstaben des Wertes im Array, um zu profitieren:
<span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token keyword">Funktion</span> <span class="token function-definition function">myfunktion</span> <span class="token punctuation">(</span> <span class="token variable">$ v</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token variable">$ v</span> <span class="token operator">=</span> <span class="token function">strtoupper</span> <span class="token punctuation">(</span> <span class="token variable">$ v</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token keyword">Return</span> <span class="token variable">$ V</span> <span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Animal"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"Pferd"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Typ"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"Säugetier"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span> <span class="token function">array_map</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">,</span> <span class="token variable">$ a</span> <span class="token punctuation">)</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>
Bei der Zuweisung des Funktionsnamens NULL:
<span class="token php language-php"><span class="token delimiter important"><? Php</span> <span class="token variable">$ a1</span> <span class="token operator">=</span> <span class="token keyword">Array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Hund"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Katze"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span> <span class="token variable">$ a2</span> <span class="token operator">=</span> <span class="token keyword">Array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Welpe"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Kitten"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span> <span class="token function">print_r</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">array_map</span> <span class="token punctuation">(</span> <span class="token constant">null</span> <span class="token punctuation">,</span> <span class="token variable">$ a1</span> <span class="token punctuation">,</span> <span class="token variable">$ a2</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">)</span> <span class="token punctuation">;</span> <span class="token delimiter important">?></span>
current
array_multisort
array_diff_ukey
array_splice
array_replace_recursive
array_rand
array_reverse
sizeof
