Function in php for outputting string

The functions used to output strings in PHP include: echo, print, printf, sprintf, vprintf and vsprintf. echo directly outputs multiple strings, print can only output a single string, and vprintf and vsprintf are used to process formatted output of parameter arrays.

Functions for outputting strings in PHP

PHP provides a variety of functions for outputting strings Functions, the most commonly used of which are:

1. echo

echo function directly outputs one or more strings to the current output buffer . The syntax is as follows:

<code class="php">echo var1, var2, ..., varn;</code>

2. print

print function is similar to the echo function, but can only output one string. The syntax is as follows:

<code class="php">print var;</code>

3. printf

printf function combines strings and variable data and outputs them in the specified format. Its syntax is as follows:

<code class="php">printf(format, arg1, arg2, ..., argn);</code>

4. sprintf

sprintf function is similar to printf function, but it does not output directly string, but returns a formatted string. Its syntax is as follows:

<code class="php">sprintf(format, arg1, arg2, ..., argn);</code>

5. vprintf

vprintf function is similar to the printf function, but its parameters are An array of parameters. Its syntax is as follows:

<code class="php">vprintf(format, args);</code>

6. vsprintf

vsprintf function is similar to the sprintf function, but it does not output directly String, instead returns a formatted string of the parameter array. The syntax is as follows:

<code class="php">vsprintf(format, args);</code>

Selection Guide

For simple string output, the echo and print functions are the best Good choice. For output that requires formatting, the printf and sprintf functions are better choices. For formatted output that requires the use of parameter arrays, the vprintf and vsprintf functions are necessary.

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