echo

Name:echo

Kategorie:Saite

Programmiersprache:php

Kurzbeschreibung:Ein oder mehrere Saiten ausgeben.

Beispiel

Beispiel 1

Textausgabe:

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token keyword">Echo</span> <span class="token string double-quoted-string">"Hallo Welt!"</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Beispiel 2

Schreiben Sie den Wert der Zeichenfolgevariablen ($ str) in die Ausgabe:

 <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">"Hallo Welt!"</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token variable">$ str</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Beispiel 3

Schreiben Sie den Wert der String -Variablen ($ str) in die Ausgabe, einschließlich HTML -Tags:

 <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">"Hallo Welt!"</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token variable">$ str</span> <span class="token punctuation">;</span>
<span class="token keyword">Echo</span> <span class="token string double-quoted-string">"<br> Was für ein schöner Tag!"</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Beispiel 4

Verkettieren Sie zwei Stringvariablen:

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token variable">$ str1</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Hallo Welt!"</span> <span class="token punctuation">;</span>
<span class="token variable">$ str2</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Was für ein schöner Tag!"</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token variable">$ str1</span> <span class="token operator">.</span> <span class="token string double-quoted-string">""</span> <span class="token operator">.</span> <span class="token variable">$ str2</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Beispiel 5

Schreiben Sie Array -Werte in die Ausgabe:

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token variable">$ ay</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Peter"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"35"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token keyword">Echo</span> <span class="token string double-quoted-string">"Peter ist"</span> <span class="token operator">.</span> <span class="token variable">$ Alter</span> <span class="token punctuation">[</span> <span class="token string single-quoted-string">&#39;Peter&#39;</span> <span class="token punctuation">]</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"Jahre alt."</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Beispiel 6

Schreiben Sie Text in die Ausgabe:

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token keyword">Echo</span> <span class="token string double-quoted-string">"diesen Text
erstreckt sich über mehrere
Linien. "</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Beispiel 7

So verwenden Sie mehrere Parameter:

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token keyword">echo</span> <span class="token string single-quoted-string">&#39;this&#39;</span> <span class="token punctuation">,</span> <span class="token string single-quoted-string">&#39;String&#39;</span> <span class="token punctuation">,</span> <span class="token string single-quoted-string">&#39;war&#39;</span> <span class="token punctuation">,</span> <span class="token string single-quoted-string">&#39;gemacht&#39;</span> <span class="token punctuation">,</span> <span class="token string single-quoted-string">&#39;mit mehreren Parametern&#39;. &#39;</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Beispiel 8

Der Unterschied zwischen einzelnen Zitaten und Doppelzitaten. Einzelne Zitate geben den Variablennamen aus, nicht den Wert:

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token variable">$ color</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"rot"</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"Rosen sind <span class="token interpolation"><span class="token variable">$ color</span></span> "</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token keyword">Echo</span> <span class="token string single-quoted-string">&#39;Rosen sind $ color&#39;</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Beispiel 9

Vereinfachte Syntax (nur für die aktivierten Konfigurationseinstellungen von Short_open_Tag anwendbar):

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token variable">$ color</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"rot"</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation"><p></span></span> <span class="token punctuation">Rosen</span></span> sind <span class="token php language-php"><span class="token delimiter important"><? =</span> <span class="token variable">$ color</span> <span class="token delimiter important">?></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span> p</span> <span class="token punctuation">></span></span>

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