array_walk

Beispiel

Beispiel 1

Wenden Sie benutzerdefinierte Funktionen auf jedes Element im Array an:

 <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">$ value</span> <span class="token punctuation">,</span> <span class="token variable">$ key</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"Der Schlüssel <span class="token interpolation"><span class="token variable">$ Key</span></span> hat den Wert <span class="token interpolation"><span class="token variable">$ value</span></span> <br>"</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">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"rot"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"grün"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"c"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blau"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function"></span></span><mark><span class="token function">Array_walk</span> <span class="token punctuation">(</span> <span class="token variable">$ a</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>

Probieren Sie es selbst aus

Beispiel 2

Setzen Sie einen Parameter:

 <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">$ value</span> <span class="token punctuation">,</span> <span class="token variable">$ key</span> <span class="token punctuation">,</span> <span class="token variable">$ p</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">" <span class="token interpolation"><span class="token variable">$ key</span></span> <span class="token interpolation"><span class="token variable">$ p</span></span> <span class="token interpolation"><span class="token variable">$ value</span></span> <br>"</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">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"rot"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"grün"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"c"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blau"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function"></span></span><mark><span class="token function">Array_walk</span> <span class="token punctuation">(</span> <span class="token variable">$ a</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"hat den Wert"</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>

Probieren Sie es selbst aus

Beispiel 3

Ändern Sie den Wert eines Array -Elements (Hinweis & $ Wert):

 <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">myfunction</span> <span class="token punctuation">(</span> <span class="token operator">&</span> <span class="token variable">$ value</span> <span class="token punctuation">,</span> <span class="token variable">$ key</span> <span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token variable">$ value</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"gelb"</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">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"rot"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"grün"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"c"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blau"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function"></span></span><mark><span class="token function">Array_walk</span> <span class="token punctuation">(</span> <span class="token variable">$ a</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"myfunction"</span> <span class="token punctuation">)</span></mark><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 variable">$ a</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>

Probieren Sie es selbst aus