Which function in php can output the value of a variable or array?

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Release: 2023-08-10 13:56:52
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php functions that can output variables or array values ​​are: 1. echo, used to output one or more strings to the standard output; 2. print, used to output one or more strings to the standard output Output; 3. var_dump, used to print variable-related information, including type and value, and output it.

Which function in php can output the value of a variable or array?

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

In PHP, you can use the following functions to output the value of a variable or array:

  1. echo: used to output one or more strings to standard output ( usually a browser). Text, variables and simple expressions can be output.

    For example:

$name = "Alice";   echo "Hello, " . $name; // 输出:Hello, Alice
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  1. print: Similar to echo, used to output one or more strings to standard output. The difference is that print can only output a string and cannot output multiple variables or expressions.

    For example:

       $name = "Alice";
       print("Hello, " . $name); // 输出:Hello, Alice
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  2. var_dump: used to print variable-related information, including type and value, and output it. Particularly useful for debugging and viewing the structure of arrays.

    For example:

       $array = array('apple', 'banana', 'orange');
       var_dump($array);
       输出:
       array(3) {
         [0]=>
         string(5) "apple"
         [1]=>
         string(6) "banana"
         [2]=>
         string(6) "orange"
       }
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The above functions can be used to output the value of a variable or array. The specific function to choose depends on the output requirements and format.

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