1 files changed, 110 insertions, 0 deletions
diff --git a/includes/functions-compat.php b/includes/functions-compat.php
new file mode 100644
index 0000000..4bc1330
--- /dev/null
+++ b/includes/functions-compat.php
@@ -0,0 +1,110 @@
+<?php
+/*
+ * YOURLS
+ * Compatibility functions when either missing from older PHP versions or not included by default
+ */
+
+// @codeCoverageIgnoreStart
+
+/**
+ * json_encode for PHP, should someone run a distro without php-json -- see http://askubuntu.com/questions/361424/
+ *
+ */
+if( !function_exists( 'json_encode' ) ) {
+	function json_encode( $array ) {
+		return yourls_array_to_json( $array );
+	}
+}
+
+/**
+ * Converts an associative array of arbitrary depth and dimension into JSON representation. Used for compatibility with older PHP builds.
+ *
+ * @param array $array the array to convert.
+ * @return mixed The resulting JSON string, or false if the argument was not an array.
+ * @author Andy Rusterholz
+ * @link http://php.net/json_encode (see comments)
+ */
+function yourls_array_to_json( $array ){
+
+	if( !is_array( $array ) ){
+		return false;
+	}
+
+	$associative = count( array_diff( array_keys($array), array_keys( array_keys( $array )) ));
+	if( $associative ){
+
+		$construct = array();
+		foreach( $array as $key => $value ){
+
+			// We first copy each key/value pair into a staging array,
+			// formatting each key and value properly as we go.
+
+			// Format the key:
+			if( is_numeric( $key ) ){
+				$key = "key_$key";
+			}
+			$key = '"'.addslashes( $key ).'"';
+
+			// Format the value:
+			if( is_array( $value )){
+				$value = yourls_array_to_json( $value );
+			} else if( !is_numeric( $value ) || is_string( $value ) ){
+				$value = '"'.addslashes( $value ).'"';
+			}
+
+			// Add to staging array:
+			$construct[] = "$key: $value";
+		}
+
+		// Then we collapse the staging array into the JSON form:
+		$result = "{ " . implode( ", ", $construct ) . " }";
+
+	} else { // If the array is a vector (not associative):
+
+		$construct = array();
+		foreach( $array as $value ){
+
+			// Format the value:
+			if( is_array( $value )){
+				$value = yourls_array_to_json( $value );
+			} else if( !is_numeric( $value ) || is_string( $value ) ){
+				$value = '"'.addslashes($value).'"';
+			}
+
+			// Add to staging array:
+			$construct[] = $value;
+		}
+
+		// Then we collapse the staging array into the JSON form:
+		$result = "[ " . implode( ", ", $construct ) . " ]";
+	}
+
+	return $result;
+}
+
+
+/**
+ * BC Math functions (assuming if one doesn't exist, none does)
+ *
+ */
+if ( !function_exists( 'bcdiv' ) ) {
+	function bcdiv( $dividend, $divisor ) {
+		$quotient = floor( $dividend/$divisor );
+		return $quotient;
+	}
+	function bcmod( $dividend, $modulo ) {
+		$remainder = $dividend%$modulo;
+		return $remainder;
+	}
+	function bcmul( $left, $right ) {
+		return $left * $right;
+	}
+	function bcadd( $left, $right ) {
+		return $left + $right;
+	}
+	function bcpow( $base, $power ) {
+		return pow( $base, $power );
+	}
+}
+
+// @codeCoverageIgnoreEnd