The ReflectionExtension::__toString() function is an inbuilt function in PHP which is used to return the string representation of the specified extension object.
Syntax:
ReflectionExtension::__toString()
Parameters: This function does not accept any parameter.
Return Value: This function returns the string representation of the specified extension object.
Below programs illustrate the ReflectionExtension::__toString() function in PHP:
Program_1:
<?php   // Defining an extension $A = 'DOM';   // Using ReflectionExtension() over the // specified extension $extension = new ReflectionExtension($A);   // Calling the __toString() function $B = $extension->__toString();   // Getting the string representation of // the specified extension object. var_dump($B); ?> |
Output:
string(98219) "Extension [ <persistent> extension #18 dom version 20031129 ] {
- Dependencies {
Dependency [ libxml (Required) ]
Dependency [ domxml (Conflicts) ]
}
- Constants [45] {
Constant [ integer XML_ELEMENT_NODE ] { 1 }
. . .
Constant [ integer DOM_VALIDATION_ERR ] { 16 }
}
Method [ <internal:dom, inherits DOMNode> public method setUserData ] {
- Parameters [3] {
Parameter #0 [ <required> $key ]
Parameter #1 [ <required> $data ]
Parameter #2 [ <required> $handler ]
}
}
. . .
Method [ <internal:dom> public method registerPhpFunctions ] {
- Parameters [0] {
}
}
}
}
}
}
"
Program_2:
<?php   // Using ReflectionExtension() over // an extension xml $extension = new ReflectionExtension('xml');   // Calling the __toString() function and // Getting the string representation of // the specified extension object. var_dump($extension->__toString()); ?> |
Output:
string(6209) "Extension [ <persistent> extension #15 xml version 7.0.33-0ubuntu0.16.04.7 ] {
- Dependencies {
Dependency [ libxml (Required) ]
}
- Constants [27] {
Constant [ integer XML_ERROR_NONE ] { 0 }
. . .
Constant [ string XML_SAX_IMPL ] { libxml }
}
- Functions {
Function [ <internal:xml> function xml_parser_create ] {
- Parameters [1] {
Parameter #0 [ <optional> $encoding ]
}
}
. . .
Function [ <internal:xml> function utf8_decode ] {
- Parameters [1] {
Parameter #0 [ <required> $data ]
}
}
}
}
"
Reference: https://www.php.net/manual/en/reflectionextension.tostring.php
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