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What are the ways to define strings in php

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Release： 2024-04-29 12:24:16

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There are four ways to define strings in PHP: Single quotes (single quotes): Use single quotes to define, and the single quotes in the string need to be escaped. Double quotes (double quotes): Similar to single quotes, but allows variables to be used in the string and the variable values will be replaced. Heredoc syntax: Use <<< and string terminators to define multi-line strings within which variables will be interpreted. Nowdoc syntax: Similar to Heredoc, but variables in the string will not be interpreted, and the string terminator must end with a single or double quote.

What are the ways to define strings in php

How to define strings in PHP

Single quote (single quote):

Using single quotes to define strings is the simplest way.
Single quotes in strings must be escaped (\).

Example:

<code class="php">$str = 'Hello World';
$str_with_quote = 'I said, "Hello World"';</code>

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Double quotes (double quotes):

Similar to single quotes, but allowed in strings Use variables.
Double quotes in strings must be escaped (\").

Example:

<code class="php">$name = 'John';
$greeting = "Hello $name!";</code>

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Heredoc Syntax:

Use <<< and the string terminator to define a multi-line string.
The string terminator can be any custom identifier. Variables in the string will be interpreted

<code class="php">$html = <<<HTML
    <html>
        <body>Hello World</body>
    </html>
HTML;</p>
<p></p>Nowdoc Syntax: <p><strong></strong>##Similar to Heredoc, but with characters. Variables in the string will not be interpreted. </p>
<ul>The string terminator must end with a single quote (') or a double quote ("). <li>
<li>Example: </li>
</ul>
<pre class="brush:php;toolbar:false"><code class="php">$name = 'John';
$greeting = <<<'GREETING'
    Hello $name!
GREETING;</code>

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