(PHP 4, PHP 5, PHP 7, PHP 8)
ob_get_contents — Devolver el contenido del búfer de salida
Devolverá el contenido del búfer de salida, o false si el almacenameinto
en el búfer de salida no está activo.
Ejemplo #1 Un ejemplo sencillo de ob_get_contents()
<?php
ob_start();
echo "Hola ";
$salida1 = ob_get_contents();
echo "Mundo";
$salida2 = ob_get_contents();
ob_end_clean();
var_dump($salida1, $salida2);
?>El resultado del ejemplo sería:
string(5) "Hola " string(10) "Hola Mundo"
This is an example of how the stack works:<?php//Level 0ob_start();echo "Hello ";//Level 1ob_start();echo "Hello World";$out2 = ob_get_contents();ob_end_clean();//Back to level 0echo "Galaxy";$out1 = ob_get_contents();ob_end_clean();//Just outputvar_dump($out1, $out2);?>Note that, unlike PHP variables which make efficient use of memory, getting the contents of the output buffer results in a new copy of the buffer being made. This can end up massively increasing the memory requirements of your script if your output is large.Example code:<?phpprint(memory_get_usage() . "<br>");ob_start();for ($i = 0; $i < 5000000; $i++) print(" ");print(memory_get_usage() . "<br>");$foo = ob_get_contents();print(memory_get_usage() . "<br>");ob_end_flush();?>Output: 351664 535915210359256